All weight loss methods have a high regain rate. Surgery is the lowest but as you say its still high
Technically I fall into that 60%. I lost 10 stone and have settled at 11 stone. So put on a stone. One might have said I was a bit too low at 10 stone, I didnt think so, although my face and bum certainly looks better at 11 stone. The point is I have regained so form part of the statistics. You have to look at the details to understand what 'regain' means.
Surgery isnt foolproof, those of us that love eating, fascinated by food, as I am, its my hobby, will have to work at it for life, just like any weight loss method you may choose, incuding medication.
OP stands a better chance to lose the weight, get it off and maintain a lower weight with surgery or medication than any other method. Bariatric advice is to just get it off, as my surgeon said, its a ticking time bomb.
And believe me, it is easier to maintain a lower weight, than to try to lose weight.