Earlier quoted context omitted.
Because some people go through TOR to browse regular non-onion web sites and their experience is not always pleasant.
> Because some people go through TOR to browse regular non-onion web sites They still go through the onion circuit. I agree with the GP, distinction you're trying to make is unclear - Tor is a browser that uses onion circuits to access the web, including onion sites. Without onion, Tor is just another flavor of Firefox.
As far as I know I2P is better for the second kind of the job but apparently is not nearly as popular, sadly.