> French person here : no differences, we pronounce them all é and we don't care.

No we don’t, wtf

é and è (as well as e but it goes without saying) are very clearly distinct sounds.

French in lots of regions in France has lost many distinctions in how things are pronounced. Paris french prononounces -en, -an, and -in almost or completely the same, for example.

I suppose you're replying to someone from the area. And it's undoubtedly Parisien to assume that the way they pronounce is how the whole country does it, lol