How will Bitcoin scale?

So when I ask the maxis say LN and then never respond to my follow ups (or it derails/they admit it will be centralised). But to me lightning network doesn't answer or solve scaling because of its limitations.

Quote from the lightning whitepaper p.55 "If all transactions using Bitcoin were conducted inside a network of micropayment channels, to enable 7 billion people to make two channels per year with unlimited transactions inside the channel, it would require 133 MB blocks (presuming 500 bytes per transaction and 52560 blocks per year)."

So Bitcoin can't scale, right? Because with the 1mb limit that's 56m people using lightning at most (assuming no shady actors, no people needing to open new channels to put in more funds etc).

What am I missing? How will it scale without being centralised? If you scale by making the block size bigger, why would that be the real Bitcoin when multiple forks have already been done already like BCH?