Huh? So monsters should just say "Hey Bob, notice that hut over there? I was thinking maybe we should do something about it but they haven't triggered us by entering our zone so I guess we'll just leave it be."It's mindboggling that so many GMs seem to think "surround it with fire & set a fire while nobody is watching" is A: viable when those inside can see out, leave/other than caster reenter any time, & those outside can not see in unless caster decides to make it transparent. or B: regularly a plausible idea.
Good think Daask burned down their own weapons cache while we were taking that long rest guys, good job! Good thing that Ashbound/Children of Winter cult burned down their own eldritch machine instead of finishing it, great work guys!
If you need a constant doom clock or world of nothing but tuckers kobolds for the spell becomes reasonable... It's absurdly broken. I once had 7 level 6 players think that tiny hut was good protection against a half dragon lich even after they realized that she was >2000 years old.... as written, it is unless she cast dispel magic or I give her the kind of magic Erandis should wield.... This exchange occurred minutes after they decided that a door & a tiny hut would protect them from the dhakaani artifact powered mists of ravenloft that had been getting played up for weeks.
* rather than her wanting to hire them for a "job" making killing them self defeating
In my campaign the dragon would spend 8 hours prepping, building traps, figuring out how to bury the hut, so on and so forth. It doesn't take tactical genius on the part of the monsters to set up adequate defenses.