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https://tvtropes.org/pmwiki/pmwiki.php/Main/NeglectfulPrecursors
If you're doing stuff with the potential to end civilization, you could just not do that (make it illegal) or hold off until the potential negative consequences can be contained.
Furthermore, I feel like this is not well thought out and monsters should be starfish aliens if they're being summoned from other dimensions. It requires a speculative biology artist to draw those, so they don't do it, but...
Can't anyone just go down there and undo the seal whenever they want? I guess it's hard to make it out alive when you do that, but it's not impossible. Also it's unclear where those sealing devices come from. They're ancient technology but can still be made?
Like the manhattan project, and CERN?
Stuff that was ultimately entirely harmless, but the physics were not entirely understood before the first tests were performed, and some legit scientists put forth absolute doomsday scenarios as the
absolute worst (but unlikely) possibility/result.
Why do you think that? There is absolutely no reason to think that extradimensional life should adhere to the rules of extraterrestrial life. And honestly, people are clearly crosspollinating across the dimensions, so likely all other creatures have too.
ps: starfish aliens are really inefficient in way too many ways, and I find them very unlikely to become dominant.
They probably could. But then monsters would start spawning again. And it sounds like they spawn in that core room and walk outwards, so it would be really dangerous for a clerk. And odds are, unsealing requires breaking the device (liek maybe it breaks if they break that shield surrounding the device). And maybe they can't make those devices any longer, and only have a limited number left (or it's simply extremely expensive to create).
It's essentially a war economy. Both the merchant's guild and their potion business depend on it. Either the merchant's guild concedes or they can keep conquering dungeons at a record pace to spite them and squash any business opportunity for both of them. The merchant's guild doesn't have a leg to stand on.
Shouldn't have put all your eggs in one basket. Learn to diversify and future proof.
These merchants essentially are war profiteers upset at peace talks finishing up.
Inb4 some idiot goes and unseals the dungeon core.
Yeah.
This is like factory-workers rioting over the adoption of automated processes in the factory-line. Or truck-drivers rioting over the adoption of self-driving trucks. Or artists rioting over generative ai. Or an arms-manufacturer rioting over their government ending a war.
It is all vested interests wanting to vest their interests. Which is understandable and doesn't make them
invalid in doing so. But also
does mean the industry is inevitably going to change and plenty of people likely has to lose and/or change jobs.