There is some robust evidence indicating that routine plaque removal does not improve outcomes for cavity prevention or gingivitis [0].
Routine consultation with dentists otherwise may be beneficial, maybe not, but it hasn't really been studied much yet. The studies that exist are insufficient to form any conclusions. [1]
My post was downvoted by those who feel going to the dentist is important. I should state clearly avoiding the dentist should not be considered medical advice from me, and YMMV. I did the research myself and determined that routine dentistry was unlikely to improve my health outcomes, this is a personal decision that people should make on their own.
[0] https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD...
[1] https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD...