Buddy, I hate capitalism... But I also know how it works.

Valve has more than one revenue stream, that means that they can afford to take a loss on something like hardware because it usually means increased game and peripheral sales.

This isn't unique to Valve, Sony and Nintendo are well known for selling hardware at break even (or small loss). These are billion dollar corporations.

Can you really not grasp how simple minded it is to see the CEO of a company (for decades) buy an expensive yacht, and assume that must mean that this one specific product that's only a few years old, must have large profit margins? Despite literally all evidence saying the opposite?

That's just not how it works, dude. Just take a moment to think about what you're actually implying.