And it's also true that Tor users usually is more knowledgeable than regular users.
I use Tor for most websites, because it adds noise to the signal, and that helps people who need Tor (including sometimes me). So if you're using Tor anyway for regular websites (loads of normal websites have a .onion version now, e.g. DuckDuckGo) that have a .onion url, guess what? The .onion site is faster to load, because the extra latency of sending it back out of Tor through an exit (and then back into Tor and only then on to your browser) is avoided, .onion traffic goes into Tor once and then straight back out to you.
Additionally, you avoid the risks of malicious exit node.