This. Your reply came while I was writing mine.

I understand, and you have a point. Opening a channel for each person on earth isn't reasonably possible at the current rates. But that is only the ultimate goal. How many people have VISA today? At the moment, it is more important to expand the network cautiously with the means we have. L2 will be a formidable tool for this, with micropayments and all that. When Average Joe gets used to pay bitcoin at Starbucks, adoption will be so wide in the "rich west" of the world that BTC will be unstoppable.

I trust the developers - I'm not talking about Core only. Third-party L3 solutions could be piggybacked on top of L2, for example. Hardware progress might give us the bandwidth and storage improvements btc needs to be ubiquitous and censor-resistant, so a non-contentious blocksize increase might be much more feasible than it is today. But we can't possibly figure out exactly what the future will be like. We have more than enough on our hands, given what BTC is now. Let us keep it safe and resilient.