Umm anyone who has studied distributed systems understands a fully distributed system cannot scale past a certain limited point. That's not controversial. That's just reality.

LN, for example, is adding degrees of centralization to achieve better scaling. Human systems have a tendency towards centralization and consolidation of power/authority as well, as we see in various ways already with Bitcoin (China, Ver, Core).

There's overwhelming evidence to believe that the future of Bitcoin is much more centralized, at which point it starts to resemble the systems we already have but with horrifying disadvantages: your entire transaction history is public to everyone, your identity can be linked to your wallet through exchanges, etc.