I've been into strength training for the past 6 months (resistance training and sports for much more) and I don't think it does, but the exercises that they did

I've been into strength training for the past 6 months (resistance training and sports for much more) and I don't think it does, but the exercises that they did weren't correct in my opinion. The resistance training that they did was for muscle hypertrophy and not strength training which works less if you are obese. After you achieve the desired muscle mass, then the calories burned will be substantial. So for an overweight person, I'd advise aerobic exercises first to get conditioned and lose some weight and increase your metabolism. And then move into strength training to develop muscular strength and neuro-muscular adaptation.