@Paperyfish
My BMI was at the lower end too, around 37. I had a bypass.
I had a gastric band 10 years ago that had been causing me problems for a good while. My surgeon advised that due to the band, scar tissue and being classed as a revision patient, a sleeve would not be suitable due to the high risk of leakage.
Within that consultation, I asked about the bypass being more 'drastic' and was given full reassurance that it was the gold standard and the safest option for me due to being a 'revisionist'. I also asked about losing too much weight and was given full reassurance that this would not happen as long as I followed a good post op regime.
One size does not fit all. Your surgeon will advise you on the best course of action for you based on your personal circumstances.
I will say that I had a consultation with a surgeon who, after reading official medical research papers that had been sent to me, was absolutely talking through his arse. His advice was the total opposite to the surgeon I ended up going with. I had zero faith in what he said as it went against everything I'd read whilst researching revision surgery. His advice was for a sleeve, despite the high risk of leak, was likely on the basis that a sleeve is easier to do and that's where his skill set was.
I appreciate that you're not a revisionist, so a lot of my experience will not apply to you. Your surgeon and pre/after care provider are the most important on your weight loss journey. Internet forums are a useful tool, but ultimately what counts is the opinion of the surgeon, one that you have 100% faith in who can supply you will all of the information you ask for, including statistical data.
I am happy to share information about the bad/contradictory advice via PM.