Zardnaar
Legend
In short you're telling me that every wizard who tries their hand at something approaching robotics is stupid and careless. And that magic only works in very specific ways and ways that shut down player ideas. And they work in those ways because you, the DM, who has absolute control, has decided they do that.
This all tells me that what you're looking for is excuses to say no. Me, when I DM I'm looking for excuses to say yes - and even more than that excuses to say "Yeeeesssssss..." with an evil grin.
As I have pointed out I DM more than I play and even when I'm a player there are more other players at the table than there are DMs. I have also in my time only ever once run into a player where the problem was player entitlement*. I can think of a number of bad DMs I've played with
where the problem was DM entitlement and the DM deciding that they should control as much as possible on both sides of the screen to the detriment of the fun of the players.
* This is not the only potential problem of course.
Warforged might exist but you don't get to play one.
There's the old hidden menace trope (Drow were this once upon a time).
On my world I think it's Tritons and Velkadins from Ravnica book.