Couldn't be more off base. I had a LOR from my community college bio professor, and I got comments at multiple interviews that he had written an excellent LOR. Also, I had taken 2 classes from him, but they were both 2 years prior to when he wrote the letter.
By the way, it's pretty common for Ph.D.s to teach at community colleges, because they're interesting in actually teaching as opposed to frantically writing dozens of grants, grinding out post-doc after post-doc, chasing down down tenure track positions with 1000s of applicants, etc...
In my time at community college, every single science class I took was taught by a Ph.D., and I took all my pre-requisites in CC.