VR's "best offer" is actually Beat Saber (which is sadly owned by Meta).
VRChat is a tiny little niche in comparison.
If I were Valve, I'd develop addicting/super fun games that require mild exercise like Beat Saber—if they want more adoption/excitement around VR.
I remember seeing Beat Saber for the first time many years ago and thinking to myself, "holy shit that looks like fun!"
They need more games like that. Not sophisticated games like HL Alyx (even though it's amazing).
Additional selling point: I lost 15 pounds after playing Beat Saber every day for three months. I still play every day, four years later.
I'd be playing it on a Steam Frame if I could get one!