Big blocks aren't everything. The LN is an impressive technology and each LN channel(takes onchain txs to open)can support 500+tps. However BCH supporter are right be the fact the LN needs big blocks to support a larger network. However there are alternative to just increasing the blocksize. One is Schnorr :
https://steemit.com/bitcoin/@sames/schnorr-coming-to-bitcoin-in-the-next-few-months
Schnorr can increase Bitcoin capacity to more than 40% without evening increasing the blocksize.

7 TPS was the limit before segwit(in reality the TPS pre-segwit sometimes peaked above 10TPS due to variance)

14TPS with blocks mostly filled with segwit txs (2MB block averages)

14+25% = 17.5TPS

14+40% = 19.6 TPS (Variance would create higher peaks than 19.6)

Thus 17.5 TPS is not the max limit but the expected future average with full blocks

3-4 TPS was the average , limit was over 7TPS before segwit. Part of this reason might be why Bitmain and their partners were mining many empty blocks for covert asic boost back than. To make it look like Bitcoin could only do 3-4 tps.

MAST which I shall post about today will also help Bitcoin scale without bigger blocks.
At 6:58 EST I put the article link here:

There are other alternative to just increasing blocks as well. They are being worked on but those two are coming the soonest.

And also Bitcoin does plan on increasing blocks in the future.