This doesnt make sense to me. Core internet community experiences to me have always been about smaller sites, message boards, mailing lists, chatrooms, voice chat groups, etc. Seeing large corporation websites like tumblr, reddit, facebook crack down on content doesn't stop any of that. it just means you need to get out of your internet bubble.
Some people just like to create stuff all day and have a ton to show, but only ever learned enough computer skills to do their hobby and go to forums.
For these kind of people, creating a new place in one click is a boon, and getting moderation and management tools out of box is also an incentive to keep it going.
Sure these people can start learning how to build places and use hosting services, but that’s a non teivial barrier to entry, and we must be losing so much in the deal.