That’s weird. I just had my 6 week follow up with my dietician and she said min Protein is 60g, but she said 90-100g was great. Maybe it’s because I’m also recovering from ACL replacement, but when I said I could get another 20-30 grams in with an extra Protein Shake a day, she seemed excited. Maybe ask your doctor and see if he/she has an opinion on protein intake and WLS specifically.
Or maybe it’s a calories thing. Protein is great but also has calories.