Ironically, the latency issue is one of the many reasons big blocks are retarded, I mean literally retarded, big blocks take longer to propagate. Even just a few milliseconds increases miner centralization by benefiting the miner of the most recent block.

(not that we should even perpetuate the idea that big blocks scale anything, the only scaling limitation is the indivisible supply)

Though technically, it wouldn't be impossible for Martians to get lucky and find a block and broadcast it back to earth before earth finds a block. Hour+ deltas between blocks happen all the time, now what if a few major miners on earth become subject to a grid-level attack or DoS? An asymmetrically weaker mining operation on Mars could take control of the chain with much less hashrate.

Getting back to reality yea, Mars will be a centralized colony for the foreseeable future with no need for external currency... SpaceX coin credits for the cafeteria don't need decentralized trustless Lightning channels.

Because there's plenty of scammers and even more useful idiots

The only scaling limitation Bitcoin has now is supply, as in, not enough people will ever be able to own enough sats (5-6 digits worth of sats) to transact, even if the chain is at a perpetual 1 sat/byte due to gigameg blocks or other shitfork.

Given the size of large player stockpiles, at most < 1 billion households/organizations will ever have sovereign access... really it's probably a fraction of that. That means there's no real-world transaction bottleneck.

Since big blocks or shitforks can't actually lower the minimum transaction cost of sovereign utility, scammers must obfuscate that with their centrally coordinated, sybil prone, fake L2 applications.