> I'd rather them write more performant code.

In keeping with the theme of the comment you're replying to, writing better-performing code and providing performance options are not mutually exclusive. Both are good ideas.

> This feels like your car having the option to burn motor oil to show a more precise clock on the dash; you don't get kudos for adding an off-switch for that.

(Sounds more like you're arguing that it should be forced off instead of being an option? Reasonable take in this case, but not the same argument.)