>>723588335 (OP)
>every RPG should have autoleveling stats
>why the fuck would you want to invest in INT on your warrior or DEX on a healer
Your healer not getting hit, especially by an attack which could paralyze or silence them, is especially valuable. Given that healers are typically defensive and aren't used for dealing damage, they're more likely to assign points to stats which help keep them alive than many other characters.
Also, what do you mean by "autoleveling stats"? The game randomly assigning INT to your warrior is an example of an autoleveling stat. When you select which stats you want to improve, that would be a manual leveling stat.
As for why you'd want manual leveling, if you're trying for a specific character build, then you'd want to put points in specific stats over others. It's probably best to have some sort of stat cap in this, just so players don't put every stat point into STR or INT in hopes of one-shotting everything. Autoleveling is to prevent this sort of minmaxing, to where a character will have their stats even out in the long run and so initial stat distribution and in-game decisions matter a lot more. It does have the problem of wanting to minmax at character creation, or save scum to get favorable levelup rolls.
