Below is a more recent paper (2023) than the one from 2011 that @daisy17 linked. There is lots of active research in osteoporosis and the 2023 paper also supports her comments. It has great discussions and a table of relative risk (RR) vs absolute risk reduction (ARR).
https://www.amjmed.com/article/S0002-9343(24)00101-3/fulltext.
Excerpt: "... For patients at high risk of fracture, especially those with prior fractures, treatment with bisphosphonates is well supported by clinical evidence that may underestimate benefits; however, for patients with osteoporosis based on bone density alone, treatment benefits are less certain. ..."