I imagine you're probably right. But I still don't understand - why not have a single Tweet, with a summary of a blog post running on your own domain? Wouldn't that make you even more internet famous?
Unlikely. Things which can be fit into Twitter threads generally are going to be more widely read and interacted with than if the same content were pushed to a blog.
The "why do ANYTHING online if it's not monetized?" attitude is such a pernicious trend. The internet will only become more censored and more homogenized if people only ever use services that will silence any thoughts/opinions that aren't 'Advertiser Friendly'.
Sure you could have ads pulled from your OWN website if you piss off an ad agency, but there are multiple ad agencies that exist. You can always switch providers.
When you go to a private company like Medium, anything you say will get you de-monetized, AND there's no other way to earn again. Some people face this situation and then create their own website to build back up their buzz, but why not start at that point initially?
I suspect this has something to do with the fact that the average 13-16 year old rarely opens their mobile web browser. To compete in 2021, you need an app. Something needs to change.
