It’s not SW, however during lockdown a PT at my gym offered an online coaching thing, and put me on 1200 cals a day. I’m 5ft 9, and also wasn’t overweight, I was 11.5 stone! I also had to get 80g protein a day, and I’m a veggie so found that hard on those cals, so I ended up basically having 3 protein shakes and one meal a day for 3 months. I lost 2 stone but I was constantly light headed, and of course I put it all back on once I stopped. I struggled with anorexia in my teenage years and this definitely brought back some of those feelings. I think SW just promotes that sort of mentality, and preys on people who don’t know/understand how actual weight loss works for the vast majority of people (calories in v calories out!)