Take it anyway you want, it's fact. Science doesn't lie.
I'll say it again: The only way to lose weight in a healthy, controlled way and to keep the weight off is to eat a balanced diet, use more calories than you consume and have at least thirty minuets of exercise a day..
Anything else is just marketing bumpf.
How can you not see that you're totally wrong? Well done for explaining your 'science' of weight loss - I'm sure that was new information to everyone!
You forgot to mention reasons why these 'quick fixes' are more appropriate for some - here, i'll name some examples;
food addiction (having no food can help with this),
morbid obesity (unhealthy levels of fat - it's better to drop the weight quick), bodybuilders/weight trainers (using ketosis to drop the fat surrounding the muscles),
psychological problems preventing your 'scientific method' (quick fat loss as a 'kickstart' to lifestyle change).
Oh, and of course there's your brilliant '30 minutes of exercise' a day mantra. What if you're too fat? What if you're disabled? What if you have heart problems which prevent cardio work?
And so on.
So basically you're talking utter rubbish, probably have no idea about the 'real world' except what you read from sensationalist media, and believe that real weight loss is 'just that easy'.
P.S. - I don't actually like lighterlife. However V-diet (which I've done - is a form of ketosis) is actually a fantastic way to lose weight (for me it was for aesthetical reasons as I weight train).