Mister Funch, if my opponent plays treetop I am much more afraid than the pain land. The curve thing is a fallacy. In my experience it happens much more often that you draw a normal land while you rather had drawn a village. Furthermore, perfectly curving out is even in constructed a rarity (unless you only play one drops which is also not that great since you will run out of cards and hence fail to use all the mana.)
Mana advantages are how many games of magic are decided. Obviously, not all games are decided by who is able to spend their mana the most efficiently, some games come down to card count and cards like Treetop Village which can increase mitigate flood and increase threat quantity are going to be contextually stronger than cards like Centaur Garden which, while also mitigating flood, do so for shorter periods of time and only increase threat quality. The higher in power level formats get, the great the impact is of being inefficient in the early turns. A single turn spend playing a tap land can and absolutely cost players entire games. Sometimes you're on the draw and starting down an aggressive 1 drop with a hand that's only green source is Tree Top Village and you won't be able to develop your Llanowar Elves until turn 2, this singular turn of lost development will not only give your opponent a round of free damage with their creature, but also your turn 3 play is delayed a full round and your opponent also has an extra draw step to find an answer to your mana dork to further constrain your mana development. Extremely small suboptimal sequencing can cascade very easily into later inefficient lines which inevitably lead to literal game losses. The faster and more efficient decks are, the more pressure there is to ensure your early game plays come through for you as the power level of modern era cards are so high and snowballing advantages so difficult to get out from underneath, that you simply cannot afford to reliably give up mana development, especially for decks with proactive gameplans which are under the gun to kill their opponent before insurmountable value engines can take over the game.
When it comes to constructed we see this trend reflected in the manabases of decks the older the formats get. You used to fairly frequently see modern UW control decks running Celestial Colonnade. According to MTGtop8.com a website which tracks top 8 appearances of decks in various major constructed events in multiple formats you can see that 2124 players brought colonnade in their UWx decks in 2016, which drops to 1791 in 2017, to 1374 in 2018, 791 in 2019 and in 2020 was down to only 140 (although this number is of course impacted by covid19 having very few paper events for modern). You can check for yourself and go back as far as you'd like but the trend line is quite clear; the decks that were putting up results shifted away from etb tapped lands. Sure, some of this in more recent years is due to printings of other high quality untapped utility lands such as Fiery Islet, Sunbaked Canyon, Castle Ardenvale/Vantress and Blast Zone, but I think that also speaks more still to just how strong having access to your mana immediately is that players are willing to give up having a 4 power evasive blocker and clocker and instead run lands that hurt them, only produce a single color or not even a color at all instead. They do this, because the untapped lands are simply that much better. And it's not just control doing this, it's faster archetypes as well. Boomer favorite, Jund, was famous for grinding people out and then winning with Raging Ravine but what flood insurance lands to they play now? Nurturing Peatland if anything and their mana curve only goes up to 2 (obviously Lurrus is a massively busted card and helps here), but other fair decks that don't have a companion to crutch on like Mardu Stoneblade don't play similar lands either, you simply can't afford to take turns off when decks like Prowess, Burn, Death's Shadow, Tron and Omnath punish you so hard for ever stumbling and taking inefficient turns and as a result decks play extremely few taplands in 2021, often a single triome or two that they hope to never draw and only fetch up on a turn when they can afford to and mana curves continue to get leaner as well with Jund Shadow, a midrange deck, typically playing 4 zeros and 26 1 drop spells! And this is without even touching Legacy where the same trends have been going on for a long long time.