Portal 1 was based on an indie game, built from the ground up by Valve. Portal 2... really, we're going to claim Valve didn't make that? Left 4 Dead 1 was based on a CS mod, built from the ground up by Valve. Left 4 Dead 2, totally made by Valve. or not, somehow, by rationale I don't understand. CS:GO was developed by Hidden Path in the very early days, with Valve supervision then handed over to Valve completely. Dota 2 was built from scratch (then rebuilt totally) by Valve.
I get that many people want Valve to make more games, especially Half-Life 3, but to say they don't make games is like an ex-girlfriend you dated for years claiming you never dated. And to claim they're "not relevant" is just... I guess people haven't heard of Dota2, or CS, or have ever used a Vive. Let's stop being babies just because daddy won't give us our shiny toy.