I have jank government insurance and this is not true. When I got out of prison and had no insurance I went to the city's clinics. Wait times have never been an issue (at most was two weeks for specialist). The doctors in the clinic were also friggin amazing doctors/people. I had a ton of shame around getting out of prison, some much shame about needing to get tests ran for HIV/Hep from being in prison but they were so good about it all (all came out negative so woohoo).
Now dentists...when we had money we went to a family friend. He still totally f'd us and did unnecessary work. It's only now that I have a cash only country dentist that I trust my dentist again. Crazy part is the cash only dentist ends up being cheaper than my previous copay/premiums insurance dentists.