The few editors I've talked to in person never got enough time to comb through everything properly. Plus not every editor is created equal, be it because of their specialty or skills.

There are books that get more time and attention, a whole team of the best editors and betas going several rounds using fancy software and their best judgement. But more books are published than ever, sell in relatively low numbers, and more and more of the publishing process is relegated to the author (even if you don't self publish), so sometimes it's one exhausted intern with barely enough time to read the whole thing.