Is your point that all bugs soak up time to fix? If so pay the bounty and add it to the backlog. Or is it too much time to verify? That seems to be something you can kick back to the reporter.
Apologetics for a bug bounty program dragging their feet on a payout because "it's not a mem corruption bug" alone is unconvincing.
If Apple wants to nudge people towards submitting more serious bugs, they can pay more so people are incentivized to work towards those rather than mucking around in gamed. But, they don't really get to say "we didn't really have time to get around to this Contacts bug, sorry": people expect them to have it fixed. That's the whole reason Apple offers a bounty at all: so that researchers tell them about it early so they can fix it.