Except they are. How many noncreature, nonremoval spells that are bad topdecks and niche in their application do you want to run in your draft decks? I'm guessing not many.
You're right, not many. But I'd argue they do need to be there, limited is far better off with the addition of tricks, threatens, tempo spells, draw spells, etc, and they all have their strengths and weaknesses.
Here's the Noncreatuere, Nonremoval spells that are bad topdecks and niche in their application I run in White:
(Pure Return is probably an okay when you're behind topdeck most of the time, but there's enough situations like
Anger of the Gods,
Control Magic,
Pillar of Flame,
Tamiyo, the Moon Sage where the creature you need might not actually be in your graveyard that I thought I'd mention it)
11 (10.5?) cards out of 66 white cards total, 18 other noncreature cards that don't fit into this category for whatever reason (Gideon, Oblivion Ring, Wrath of God, etc)
Some of these are fine at parity, but scales is fine there too with quite a few of the counter cards, but yeah. Each of these is niche, shit when you're behind on board, and are generally bad topdecks unless you're already not losing.
What kind of bullshit reasoning is this? You want to run an all-Path to Exile cube? All I'm asking is, is Hardened Scales good enough to justify running? I've heard nothing but magic christmasland scenario's so far. I get that curving out Hardened Scales > Gore-House Chainwalker > Volt Charge > Shaman of the Great Hunt is great, it is, but curving out Gore-House Chainwalker > Volt Charge > Shaman of the Great Hunt is also good, and that leaves you with another card in your deck that won't be a dead draw later in the game.
Also, none of the cards you want to cut for PtE above are anywhere near as dead of a draw as Hardened Scales. I really don't get what you are trying to prove here.
So yes, maybe Scales is fine. I don't know, I've never played it. The mana cost might save it. My gut though tells me that it's the second coming of
Doubling Season. An awesome card for casual constructed that will never live up to its potential in limited formats (like cube).
What I want to illustrate here is this kind of phemenon: Which of these is better for your deck?
Charge is never getting the nod there: you need way more of every other card in that choice that it's never going to be the pick.
But having a deck where your deck is 100% good topdecks, all creatures/removal spells is unrealistic (And likely not good for a limited format, see the addition of threatens, tempo spells, combat tricks etc above)
This is a much more interesting question:
I think to myself, is there a deck where I want scales as much as I'd want goblin bombardment out of the above 4, and it's definitely possible.
FSR's got a point about it being good on turns other than 1, and while those all involve specific cards, those specific cards are high in number and key to the deck, so the chances you have them is quite high.