The appealing part is that it is potentially lethal and maybe the high skill requirement to be able to serve it. That's pretty much it.
It's tasteless, mildly chewy texture. Most of the flavor comes from the soy sauce. In hotpot/stews it becomes hard rather quickly. There are lot better fish for hotpots.
And as far as the "potentially lethal" section goes:
> Of the 23 incidents reported in Tokyo from 1993 through 2006, only one took place in a restaurant; all others involved people catching and eating the fish.[0]
I don't have actual statistics, but you walking on the street seems more dangerous.