I’m surprised the cost doesn’t increase per level. 100g per level wouldn’t make it prohibitively expensive, but enough to put people off doing it all the time.
That said, I just never used it. Even though I never planned a build in advance, never looked up what abilities would unlock later and probably could have optimized some characters better in hindsight.
It’s just not hard to ignore the feature completely, or use it very sparingly if you don’t like it.
