Having lost a bunch on HCG I can respond to why we might "need to reset" after losing weight. You see, most of us who use it to lose "copious amounts" were Leptin Resistant prior to using HCG and this is a primary reason we gained, we are discovering by studying Dr. Kruse's blog. Losing weight doesn't change that and losing weight, alone, is not what the reset is about. It's about becoming healthy for the first time in our lives.
You can be uderweight and be Leptin Resistant.
As Dr. Jack teaches with intense biochemistry detail, each organ in our body has Leptin receptors. If those cells are resistant then those organs don't function well. That opens the door to all manner of disease.
When we lose while on HCG, all is well and we are very happy; but many have difficulty keeping the weight off after the loss without extreme low carb eating and living without even good Paleo food starches. For some, that doesn't even work well. The Leptin RX is fixing that problem for many of us! It's real!
BTW, you can be "leptin deficient" or have lots of leptin in your body as shown by labs, but that is meaningless. If you are "resistant" your body won't use any amount of the Leptin to unlock the receptors to keep your metabolism running correctly and let your hormones convert what they are required to convert for optimal living.
And, if a a morbidly obese person losing weight (which is what happens for everyone I've known who do the protocol correctly) is bad for you, then you are right: HCG is bad for you!