Earlier quoted context omitted.
Ethereum sanctioned, you mean Geth? Geth does not go away in 2.0. You will still need it, as it's still the main software that executes the transactions. "2.0 validator" is not a node, it's more like a client that talks to the PoS chain nodes (Beacon).
Until there's an Ethereum Foundation backed validator, a huge number of people are going to stay away. The Ethereum Foundation can do things like roll back a broken DAO. A 3rd party offering a potentially broken validator cannot force a fork to fix things. It's also super weird the foundation is not building the validation code into Geth and making it a baseline part of a reference node as PoW certainly is.
Think of the foundation as someone like the World Wide Web Consortium. They research and lead the protocol(s) standardisation, but it's not up to them to do the implementation, besides perhaps providing a reference implementation.