„These effects are in contrast to the bone-protective effect of the SERM tamoxifen, which has partial estrogen-receptor agonist activity.“
From the study you cited.
Also the picture here from the study shows that with Tamoxifene bone mineral density increases and fracture risk decreases compared to AIs. Remember these results are in WOMEN. Partly in post menopausal women which is not your situation. You should look for better studies, applicable to your situation.
Here’s a thread for you to read and some studies are suggested there that you should read.