What does that even mean? The FCC is essentially the next plausible energy range we can probe with a collider.

Going larger would cost more, and add risk.

So like, yes? The obvious thing to do is to analyze our models and come up with experiments to do within energy ranges which are plausibly accessible with near future technology.

This is where there is a questionable issue: some network of dishonest scientists may have retro-fitted the models in order to get realitic energy ranges for this new collider.