A recent Cochrane data base review on the use of exercises for the treatment of low back pain indicated that they were no better than a placebo or no exercise at all, but the evidence is still uncertain. 

Review Cochrane Database Syst Rev. 2023 Aug 30;8:CD009365. doi: 10.1002/14651858.CD009365.pub2.

Authors' conclusions: Exercise therapy compared to sham/placebo treatment may have no clinically relevant effect on pain or functional status in the short term in people with acute non-specific LBP, but the evidence is very uncertain. Exercise therapy compared to no treatment may have no clinically relevant effect on pain or functional status in the short term in people with acute non-specific LBP, but the evidence is very uncertain. We downgraded the certainty of the evidence to very low for inconsistency, risk of bias concerns, and imprecision (few participants).

So, after decades of treatment for low back pain based upon exercise therapy, may have been a waste of money, spent by patients and third parties, yet they are still prescribed. Where is the evidence?

Think about your skeleton as if it is a car chassis. Keep it moving, but within reasonable limits. You are not going to wear it out, you are more likely to have it rust up.