> expressing doubt over it's worth always gets you hit with "Well maybe you're just not enlightened enough??"

I also doubt that blockchains contribute anything of value for most applications that are currently being tried out, but I also felt that "selling blockchain blocks" was an odd way to phrase it.

It's a bit like someone claiming that a perpetuum mobile is impossible because "movement consumes energy and eventually it will run out". You can't tell whether they have the correct idea about conservation of energy and momentum or whether they actually believe that moving at a constant speed would constantly require energy even without friction.