The way stats (“ability scores”) work in 5th edition with the point buy system is that everything caps at 15 unless racial bonuses are involved.
And even through level ups and feats you can’t raise any stat above 20.
Personally I hate dice rolling for stats. It can be either incredibly unfair to different players or borderline a cheat when you can re-roll as many times as you want completely unchecked by a DM supervising the process.
Issues that do not apply much in single player games...
Yes there is multiplayer, but the heart of the game is single player, my personal solution is to make ability rolling an optional rule and you cant play with other people unless they have the same optional rules enabled.
