I'm not convinced this is true in general, even if it is often true. Signage is unclear or absent. Certain departments are probably corrupt or inept.
There are also times when avoiding tickets is basically impossible. My local (and relatively large) community college brilliantly decided to do all three of these things at the same time:
1. Close down the third largest lot on campus.
2. Lease out half of the second largest lot on campus to local businesses.
3. Oversell permits for the remaining parking.
As a result, students began parking on the city streets. But the local residents didn't like that, so the city made those streets permit only (and only gave permits to local residents)* . The college's response was "get here early," which at best is not a solution and at worse, exacerbated the problem by making parking even less available in the early parts of the day. Later they added a meager shuttle solution which they didn't even keep for an entire semester (the parking situation lasted for YEARS rather than months because of theft, lawsuit, and resident concerns about the job site).
Frankly, I would be impressed with anyone who didn't get a ticket over that time period and still managed to make it to classes.
Looking further, the local downtown simply has inadequate parking. The downtowns of other nearby municipalities are the same. It certainly makes political sense to keep parking prices low and just ticket the hell out of violators rather than raising prices to keep demand in line with supply and making consumers and businesses unhappy. I'd be very surprised if these municipalities hadn't worked out the math and figured out which results in more money for them.
*Those roads are still (and probably permanently) permit only, so the only ones really suffering are going to be the short-sighted locals.