empirical evidence pretty much shows that the 2x part of segwit2x is not really justified
Bullshit. The vision is the entire world employing Bitcoin. How are we going to get there? Nobody can spend Bitcoin if they don't already have Bitcoin. Have you thought about the limit of adoption even assuming the desire was there? How long will it take to onboard the world?
Currently it would take over
30 years to send each person on earth a
single Bitcoin transaction. Think about that.
Lightning does nothing to alleviate that.
Segwit does nothing to alleviate that.
Schnorr sigs does nothing to alleviate that.
The only metric that matters in this is transaction throughput - pure and simple. To a first order approximation (i.e. with already minimal-size transactions), this is directly and linearly proportional to block size.
True, 2X is insufficient. As is 8X. But they are steps in the right direction. The
only direction that
can possibly get us to our goal. Larger blocks are a
requirement for Bitcoin to be meaningful to humanity as a whole.