Personal taste.
A lot of people do admire the character, and that can outweigh your own, more neutral opinion.
For instance, to me, Wolverine is a good character, but I’m not particularly excited by his involvement in a story, and don’t care that much about his first appearance.
Many are much, much more excitable in that respect, and the rabid speculation is significantly additive to the runaway prices for both characters.
Your response may be quite cold, but it’s always mindful to appreciate that a majority may think, be motivated, and value quite differently.