PoS mining is vulnerable to many attacks and cannot be scaled the way that PoW can be. I would like to know why so many people are advocating for Bitcoin to stop using PoW mining and to switch to PoS.

PoW is by far more secure, the level of security will increase as the value of Bitcoin increases as people will want to mine with more powerful miners. It is also not possible to fake PoW.

Did you not read my whitepaper?

-Satoshi