sprout-fics answered:
That’s the thing anon, is that is isn’t the nature of the platform.
Imagine if all the people you follow never reblogged anything.
Your dash would be empty. Nothing.
Tumblr, as it’s original concept, was intended as a platform designed for sharing. You had to go seek out people with your interests and follow them precisely because they shared things from creators. Why would you follow a blank blog, or someone that never shared anything?
Things have changed a bit, yeah. We have the ‘for you’ page full of terrible recommendations, you don’t have to go hunting through tags anymore and can just have them on your dash recommending you things passively, but the original concept of a platform built on it’s main function being that of sharing works/art/media is still there. If we all stopped reblogging, hell if we all stopped tagging things, we’d never find anything on here. We have to reblog.