Please, that's because the hacker / DIY community took to it first.
Would you say investment clubs are dollar user communities?
What would you call a group of people that have banded together, all owning stock in a very specific company, trying to increase usage of that company so it can remain in business and their stock values can remain where they are or grow?
Bitcoin users meetups, non-profit organizations dedicated to supporting bitcoin, bitcoin related community, miner consenus and voting, are not evidence of a "bitcoin userbase community"?