Etherum merge to Proof of Stake dangerous because of centralisation?

I read couple of things about ethereum going to POS beeing not the best in the long term, as it risks to get more centralised and that 51% of it could be aquired by big corporations like banks etc… Isn't it scary and couldn't be that enemies of crypto will make use of POS to crush it all?

I hope Vitalik and team know how to avoid that centralisation and to be "aquired" -> loosing control..

Would love to get some wrinkles and opinions! Damn I just want all of this Ethereum and it's project to work without too much interference by big corporations….

Cheers and thanks for your inputs 🙂