Yes to this. No other player should be telling another player how they must play their character in general or how they must slot their stats specifically. If someone starts with a 14 instead of a 16 in their primary stat, is the +1 ability modifier difference really going to ruin the campaign? If so, sounds like there's bigger issues at hand for that table.
I've had players deliberately put a 12 in their prime attributes which lead to a TPK.
I don't care if you get yourself killed,I do care if you get others killed.
Mearls also said that was the assumption vs powergamers wanting a 20.
If you build a crap PC you're effectively trolling the rest of the party.