Because it’s a theme park!
Seriously, this design is very poor. It’s very inconsistent. I can’t stop wondering if those fishers that died because of nautiloid crash were aware of all this show going on around. Imagine fishing that morning trying not to think of that strange temple nearby, tieflings roaming around, goblins slaughtering everything, druids plotting something, and than all of a sudden a big UFO falls down right on their pity heads. I can’t even understand where did these fishers come.
And yes, this is ok for D&D. It’s just the pacing which is missing.