Suppose we increase the blocksize "so that we can onboard 1 billion more people." Ok, but then instead of onboarding more people we may just have the existing users increase their transactions by 10x. Then what? Fees would have to compensate and you again crowd out the newcomers.

Changing the blocksize ultimately doesn't improve anything and in fact can weaken the network. Unless we can prove that something necessary can't be done without changes we shouldn't prematurely change things.

The pendulum has swung...

Communists are losing control of things Geopolitically...

They're regrouping on the digital battlefield by attacking Bitcoin

NO.

Currently blocks are clearing in the 19-29 sat/vb range. Increasing the blocksize could drive that down significantly.

What would happen to all the miners and the investments they made? I suppose it would destroy them? I guess none of this matters to those who are convinced that they need to keep fiddling with the protocol until they "perfect" it.

No

Lol what for, so we can cook the remaining nodes faster?