[notechback]

Gdpr does not force the banners. It forces to ask for consent before tracking users across sites. This doesn't have to be a banner and it doesn't have to be if you only use technical cookies (login, session, ..)

You only need consent if you include Google analytics or ads or a similar platform. Those platforms push the banners on people, pretending that those are needed.

The reason you see the banners everywhere is that a huge number of sites integrate these spy services.