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.