Absolutely. But: I don't think anybody is saying that high profile extensions should receive less scrutiny?
For high-profile extensions, the impact is higher for both false negatives and false positives. So they should receive more attention.
I do not know anything about Mozilla's internal procedures regarding add-on approvals. However, for a high profile extension like uBO/uBO Lite... it should either require multiple reviewers, or maybe just an escalation to a senior reviewer or something. You should never be a single human error away from a high impact mistake.
Maybe they do that already, I dunno. But it seems hard for me to believe that multiple people approved uBO Lite's yoinking.
Extensions are SUCH a crucial part of FF's appeal. And uBO/uBO is arguably the most important of them all.