What an absolute garbage take.
First, that $500m was part of a larger amount that was already authorized. Biden isn't free to do whatever with it. That's not how it works.
Also, it's not $500m in cash. It's $500m worth of military equipment that's already been manufactured. So no, we can't just send rockets, shells, etc. to California to fight wildfires.
As if that's not enough, you somehow have a massive overestimation of what $500m (let alone $50m) will get you. For example, CalFIRE's yearly budget is nearly $4b. Yes, with a "b". Hell, the LAFD is budgeted at $820m, and they're only responsible for LA.
You wouldn't be able to do shit with $50m, or even $500m, to guarantee no wildfires throughout the state.