If these institutions attempt to control it, then they’re not normative.
It does make perfect sense when the improper use of tenses or grammar break the temporality, spatiality or relationships of the narrative.
Eg. The obvious ones in french: ce/se, ça(cela)/çà/sa... etc. A bit less obvious: “après qu’il ait”, subjunctive after stating a fact or is the subjunctive intended and it wasn’t a fact... etc.
And sometimes it becomes poetic “à l’insu de leur plein gré” when both forms are correct but with completely different meanings.
It does make perfect sense when the improper use of tenses or grammar break the temporality, spatiality or relationships of the narrative.
Eg. The obvious ones in french: ce/se, ça(cela)/çà/sa... etc. A bit less obvious: “après qu’il ait”, subjunctive after stating a fact or is the subjunctive intended and it wasn’t a fact... etc.
And sometimes it becomes poetic “à l’insu de leur plein gré” when both forms are correct but with completely different meanings.