People are doing so because the math is not mathing.

Assuming that all the claims are true, this would lead to a collapse under its own weight, because at that point, supposedly, most people won't be needed in the jobs they currently occupy.

Assuming the claims aren't true, there will be a reckoning where all the glitter thrown will hit the ground and people that invested would like to have their marbles back at whatever the cost.

I'd be betting on the latter rather than the former. BECAUSE all those companies are RUSHING for an IPO because none of them want to be left with the bag.

Just for the sake of comparison and to put things in perspective, just for the spaceX situation, running a datacenter is no easy task and require significant maintenance and supporting infrastructure, now you're going to tell me that you can achieve the same and even more in space where virtually everything is more complicated to achieve? And you're telling me that your entire business, or at least a big majority of it, will be this entirely unproven infrastructure? Seems like a bit of a stretch to me...

Now this being said, somehow some things may lie in the middle, but people seem to be a bit either too fond of the claims or too aggressive towards some part of the tech stack.