I tend to lean towards this being the case however as mention he doesn't have stakes, maybe friendly competition? In an add where they showcased all the companies making games for the Series X, Valves name wasn't their so i think that's enough proof he doesn't care for the consoles themselves.
I don't even know why he could even come to such a conclusion, as Gabe hasn't geared Source engine specifically towards any given console like Tim has been doing with UE, as well as not porting any of his games to current systems in recent years, and let's not forget that MS hasn't been buying shares of Valve either like Sony has with Epic.
The notion that Epic has more to gain holds more ground that the silly notion that "because it is" comment means Gabe has more to gain than Epic.
I find the idea in general funny, because it's clearly a mirrored backlash comment, when Epic was fawning over just the PS5, but we already know what Tim is like, so there really wasn't much to see other than his usual commentary. Gabe utters a few small words while staying in a quarantined country, and that's somehow exactly the same as Epic?, absolutely ridiculous.
Step right up come on in, feel the buzz in your veins, I'm like an chemical electrical right into your brain and I'm the one who killed the Radio, soon you'll all see
So pay up motherfuckers you belong to "V"