That's exactly what drove me into seeking out Lemmy instead. I hopped on Mastodon and it made me feel like I was being coralled into following some niche hobby forum exclusively, and I wasn't into that. It didn't explain that the instance itself was largely irrelevant and that the rest of the platform would open up to me after choosing one.

Lemmy still had a learning curve, but having experience with reddit I was able to pick it up easily enough.