My point is, it may be a concept that only a narrow pool of players can play well. But it still comes down to the problem being the players, not the archetype.
I'm not convinced. The archetype pretty much says "Please ruin a campaign". Technically, a good player could ignore that advice and still run a fun character. But this involves the player having to correct the problem rather than there not being a problem to begin with.
No one will ever convince me "character who has ZERO fear at all to the point where they aren't afraid of being thrown in jail, being eaten by a dragon or their friends being angry at them and has a HUGE amount of curiosity and a complete inability to understand consequences or property ownership" is a good idea for a character.
Tass got away with it because the author kept moderating his behavior using kind of kludgey reasoning where Tass would say that he wasn't "afraid" of Raistlin because Kender don't have fear or a preservation instinct, but he...for some reason didn't want to make Raistlin angry. But the books were fairly clear that his behavior was odd and that Tasslehoff was likely fairly rare among Kender because was actually developing a sense of fear. Which is why he stayed alive so long.
He met a bunch of Kender who certainly didn't have the same ability to emulate fear that Tass seemed to have and there were stories of Kender who would just jump off cliffs to see what would happen.
Plus, no matter how many times property ownership was explained to Tass, he NEVER understood it. I understand playing a race with an interesting cultural background like "We don't have a concept of property ownership" but Kender seem to have a genetic trait that makes them incapable of grasping certain concepts AT ALL. Their brains just didn't function like anyone else's. They all have brain damage that can't be fixed. You can imagine a Dwarf that grows to understand why elves like trees and flowers. The idea that a Kender stops stealing, understands property rights and gets a sense of self preservation is absurd since it it built into them. It also makes them short humans. They are entirely defined by the things that cause problems with campaigns.
Which is why certain aspects of Kender can make for a fun character, that character only stays fun by selectively ignoring other traits of Kender. Otherwise the first time your Kender says "I'm just going to walk into that city of Drow and say hi and see what happens" then either he's dead or the entire party is when they try to help him.