It's been said that there's no such thing as a bad idea, just bad execution. But the problem with this notion is that suggesting it guarantees you will get flooded with know it all's coming up with the intentionally dumbest ideas imaginable just to prove you wrong.
However, it's not like making something great from something stupid is anything new. Clever showrunners, writers, directors, and so forth have made greatness out of basically nothing plenty of times before.
Sometimes they do this by finding a clever angle on the material, or they just find the right person for the job who takes one look at the assignment, stands up and says "I know exactly what needs to be done".
However it's accomplished, there are a ton of shows out there that, upon their announcement, most people lacking context took one look and asked themselves and presumably their tiny Twitter fiefdoms how in the hell that got greenlit, that then proceeded to blow everyone away upon release.
These shows managed to take their dumb ideas and base premise, and build something truly special out of them.
10. My Little Pony: Friendship Is Magic
While the My Little Pony line of toys was pretty much always successful, the tie in material such as the shows pretty much stuck to advertising to VERY little kids because who else would watch a show called My Little Pony?
Well, when you attach kids show genius Lauren Faust, the answer to that is everyone, apparently. Through clever writing, detailed world building, and entertaining characters, this show took the entire world by storm and rooted itself permanently in the internet's subconscious through just being a really damn good show made from an IP and idea that 90% of people would find idiotically saccharine.
Close to a decade on since that first episode rocked the internet to its core (ten years, dear god almighty...) it's interesting looking back on a show that no one saw coming. I mean sure, Faust being attached definitely told us it would stand a bit above the rest, since her name carries the pedigree of multiple great cartoons (and Foster's Home for Imaginary Friends, but we all make mistakes) but even after she left, if anything, the show got BETTER.
And all from the idea of pastel horses talking about friendship.