Does teeth really shift after tooth removed without flipper in place? feel as if flipper can do more damage than good?

Yes, they do: Over time, teeth can shift. No reason the RPD should do more harm than good, unless it doesn't fit properly or meticulous oral hygiene is not maintained. Have you considered dental implants as a replacement for your missing teeth?

Yes: Teeth will collapse into vacant space. Flipper is a temporary space maintainer. See your Dentist for a more permanent solution such as an implant/crown.

Flipper: Consider the flipper a temporary solution to problem. An implant with permanent crown completes a permanent solution to problem.