No because the user generating the content isn’t a virtue of any sort. They’re just doing free work for a company. If they choose to do that, that’s their choice.
In fact I think this is good. It makes it very clear that no, it’s not your content and no, you don’t deserve any rights just because you feel like you own it. Twitter will do as it pleases with “your” content.
I would very much welcome a far more informed environment where people were forced to face the details of IP rights and what it means to post content on these services.
You own the copyright to your own tweets. When you tweet you give Twitter a license to display the tweet, but you still own it. This is all spelled out in the Twitter terms of service.
In fact I think this is good. It makes it very clear that no, it’s not your content and no, you don’t deserve any rights just because you feel like you own it. Twitter will do as it pleases with “your” content.
I would very much welcome a far more informed environment where people were forced to face the details of IP rights and what it means to post content on these services.