Compared to the historic status quo where there were no other chargers, and Tesla had exclusive access to a large-ish proprietary charging network, it looks like Tesla giving up their advantage, and seems bad.
But the forward-looking status quo was going to be a gigantic network of CCS chargers that makes Tesla's proprietary network look small, with every other car maker using CCS. In that world, Tesla would have had to switch their cars over to CCS eventually and retrofit their existing chargers to CCS, and people who bought Teslas with the proprietary plug have a terrible UX of needing adapters everywhere.
Compared to _that_ status quo, this is a huge win for Tesla (and one that back-foots every other carmaker, which -- if NACS does take off -- need to do their own migration to a new charging port and strand their existing customers with the adapter life, making their earliest adopters angry and frustrated). So yeah, this is a great move for Tesla, and GM and Ford in enabling it are total idiots. (Rivian is just going along with the semi-inevitable at this point.)