I see a lot of similar stories at r/keto. How anyone can think that eating those kinds of foods over your life won't have negative effects, is baffling. I see images of "my keto snack drawer!" full of beef jerky and pork rinds. I can certainly understand why that diet appeals to a lot of people though.
It's no joke that people lose a lot of weight on keto diets. Whether or not that's a long term solution to a more healthy lifestyle is another matter. I imagine most doctors would recommend staying away from McDonald's and bacon, and stick to a low carb diet (you were being monitored, which is a rare exception to most keto dieters).
Either way, a life without moving and sweating probably isn't the best for long term health regardless (Assuming there are not other medical issues other than weight loss). Keto certainly will work to drop a lot of weight fast though, which might be the kick in the ass most people need.