

Not quite. Reuploading is at the very least an annoying process.
Uploading anything over Tor is a gruelling process. Downloading takes much time already, uploading even more so. Most consumer internet plans aren’t symmetrically either with significantly lower upload than download speeds. Plus, you need to find a direct-download provider which doesn’t block Tor exit nodes and where uploading/downloading is free.
Taking something down is quick. A script scraping these forums which automatically reports the download links (any direct-download site quickly removes reports of CSAM by the way - no one wants to host this legal nightmare) can take down thousands of uploads per day.
Making the experience horrible leads to a slow death of those sites. Imagine if 95% of videos on [generic legal porn site] lead to a “Sorry! This content has been taken down.” message. How much traffic would the site lose? I’d argue quite a lot.
The number of people abusing social systems is a rounding error.
At least in Germany, there are so many barriers in place to prevent ““leeches”” that people who are actually in need of social support don’t have any access. Which is the entire point of erecting barriers might I add.