I don't recall what the official stance is on that sort of thing. At least in my area, we were heavily encouraged to use "rules as written", and to only make rulings when there was no explicit developer guidance. What this resulted in was, any time I would make a ruling off the cuff, someone...
So I thought the same thing as you did. But when someone asked Crawford about it, he very emphatically said that the Hut has a floor.
You can rule otherwise of course, but at the time I was stuck (AL game) and forced to concede, preventing an encounter of incorporeal enemies from slipping inside.
So what I've learned about this is that you should totally make illusory Tiny Huts to mess with enemies, because they automatically recognize one on the spot and have countermeasures prepared to deal with one.
Well, that's what I would do, if illusions didn't suck in 5e and there was one that...
I'm still not sure what stops the party from going "oh look, we are being attacked", fight the monsters, and then recast Tiny Hut and go back to resting after the encounter.
If the answer is "there's too many enemies", ie, overwhelming force, then nothing was going to save them. I keep getting...
Most problematic spells that have been with the game for a long time seem follow this particular trend that they only become problematic when they become easier to cast.
Light was once a 1st-level spell. Rarely used.
Goodberry has been a Druid spell for decades, but it always had this...
"Fun" is subjective though. There is a certain class of player who enjoys finding exploits and, well, exploiting them. Out of morbid curiosity, I've watched YouTube videos about the video game speed running community, and the way they "play" games is a combination of ridiculous skill and doing...
Uh, ok. Go through the Monster Manual again. Note how many monsters are presented with spellcasting. Let me reiterate the point I am making.
Imagine this mysterious creature, the Novice DM. He's got the core books, he's ready to start running adventures for his friends! The books tell him...