Fair enough, but you should post your content elsewhere too, as a backup, and to reach more people perhaps.
While platforms dominate, instead of content dominating (see podcasts where this seems to be happening), you will always be a prisoner to what happens on the platform.
I definitely do but what's interesting in doing this is that it actually reveals to me how much each app really has its own culture. Sometimes I cross-post if it's a big project that I've been working on. But, I've found a lot more success in tailoring the content to the audience on each platform rather than trying to force something upon them.
It is hilarious to see “do more work for less returns” being bandied about on a business web forum.
Another hilarious observation: they flippantly tell you not to put your eggs in one basket while strategizing and salivating over how to make the sole basket in which everyone must put their eggs.