I think you're collapsing a few different concepts together. Calling something a scam implied intentional deception about the underlying business. I don't think that's the same as selling an extremely optimistic vision at a valuation I personally think is unjustifiable.

Plenty of companies have traded at prices that assumed almost everythign would go right. Most of those expectations eventually proved wrong but that doesn't retroactively make them scams.

If the argument is that space data centers or some of these future initiatives are technically unrealistic, then criticize those ideas on their merits. If they're impossible or economically irrational, the market will eventually price that in, even if it takes a long time horizon.