And I would hard disagree with that. It’s not like more chances have a lower drop percentage. Sometimes you’re lucky, sometimes you arent.
Any time RNG is tied to cosmetics should be pure RNG.
Player power things, like legendaries, old azerite essences, etc should be what you’re suggesting, rng to a point then deterministic.
But cosmetics that have no effect on player power? You’ll get them eventually, but you’re never “discouraged” from continuing.