"there are frequently reputational, professional, and economic consequences"
Which can and should be handled under civil cases.
You can extend many these problems, health effects, and the thoughts of suicide to many other issues too - victims of rape, assault, harassment, burglary, etc.
So we end up with violent and property crimes which also contain these emotional damages, vs just an emotional crime. You would need to prove that this emotional-only crime is somehow more important and these other crimes that contain those damages plus violent or property damages. It's not that there isn't harm done by revenge porn, but that the damage done by others is objectively worse because it contains additional elements.
"It's not as though the only recourse we have is to increase the system capacity."
Then please, do explain. Because the only logic I see is that you ignore other crimes to pursue these, or you increase capacity. And frankly, ignoring any crimes undermines the entire system due to unequal enforcement and ostricizing some victims but not others by not giving them the recourse due under law.