If we keep increasing block size, "more transactions" doesn't imply a requisite increase in fees. That all depends on how limited block space is. If we increase block size beyond demand because technology advancement allows it (Like Bitcoin Cash), fees will drop towards zero. We need full blocks and a constant transaction backlog, otherwise there is no fee pressure.
Now, what evidence do you have that "higher fees will kill Bitcoin?"
pools dont need fee's for decades
so drop that mindset of them needing fees now
causing a transaction backlog and fee pressure NOW kills off the desire and utility of bitcoin.
people dont and wont want a system which costs them more than other networks and still get delays (yes im using LN's promotion).
the very point that people love and want LN is the very point that proves that people are already angry and disliking bitcoin.
so why is bitcoin hated and detested. because fee's are too high and mempool backlogs cause bitcoin to be too slow.
if fee's were low and no backlog, people would love bitcoin and not care for LN... LN would then be seen as just the commercial service for business hubs to make money from by offering a banking system(counterparty authorised tranasactions)