But to be honest, after thinking for a while, I think we have another problem besides block size and they are miners. Mining is becoming way centralized, pools are collecting all the transaction fees and people are willing to join pools that don't share transaction fees. These pools are one of the biggest pools who can flood mempool with their resources and gain more profit. They can flood it easily because they confirm the blocks and fees go back to their pockets but increased block size should make it a little bit hard for them to do.
Actually it's the opposite.
If 4GB blocks become the norm (because that's what BSV folks envision), then FTTH would become mandatory. ADSL is still the most common (baseline) connection worldwide, hence why 1MB block size makes sense as a "baseline".
Hell, I would argue that the few remaining, hyper-competitive pools would be concentrated into a single geographical spot (maybe USA?) and they wouldn't even use FTTH.
They would just use LAN/Ethernet connections (1 Gbps symmetric) to sync with each other! Kinda like a LAN party if you will.
You really like this scenario? This is not very different compared to fiat/central banking (i.e. ECB TARGET2 ledger).
I really wonder if big block fanatics are sincere good guys/idealists or government trojan horses/feds trying to hijack BTC, even though they pretend to preach "global adoption".

I sincerely hope we won't have to find out...