Don't listen to him. The whining about small blocks is just a narrative BCH folks want to push. Yes, it's true that currently bitcoin blockchain processes about 7 transanctions per second. But mempool is almost empty, 1sat/byte transactions go into next block - there really isn't any pressure to make blocks bigger right now. No emergency. And making blocks bigger comes with a big risk of spammers, so if we have other alternatives, we should take them. By the time people need much more than 7 transactions per second lightning will be fully usable, so there really isn't any problem.

That is the price to pay for decentralization. That said, further optimizations will increase the number of transactions per block, and second layer solutions can scale bitcoin to a vastly larger size.