Comment by pinko

Privacy through uniformity, operational security by routine, herd immunity for privacy, traffic normalization, "anonymity set expansion", "nothing to hide" paradox, etc.

I.e., if you use Tor for "normie sites", then the fact that someone can be seen using Tor is no longer a reliable proxy for detecting them trying to see/do something confidential and it becomes harder to identify & target journalists, etc. just because they're using Tor.