That is not a given. And, even distribution is only part of the equation. If they are sufficiently short, then even being somewhat unevenly distributed should not have much of an impact on latency. For example, if the max length of a pause were 1ms, and 99p latency were 15ms, you'd have to be fairly unlucky to see a 33% increase in latency99 due to GC. That would entail 5 of 25 pauses happening during a 20ms period in a 1s window.
(This idea is not purely hypothetical. For example, Go's GC has very low STW periods.)
> It's pretty much accepted everywhere
Eh. Apparently everyone thinks C is the best language for cryptography and other secure but not particularly perf sensitive code. Go figure. Sometimes the wisdom of the masses is not wisdom. Best not to appeal to it during argumentation.