“a significant amount of time.” That’s the problem. They want noticeable weight loss instantly, and promises of “ten pounds in two days” on a snake oil fad diet sound very attractive. The alternative is healthy eating and CICO, which is slow and you have to sit around with your fat still on you for most of the time. It doesn’t matter if it works - it’s slow, so a fat is going to avoid it.  Therefore, a fat would rather try some ridiculous tofu keytone enema diet for a couple of days, wait a week and then try the military booger-eating diet, wait a month and have a go at the “eat all the junk mail you want!” diet until they can give up on that too, and claim “I’ve tried EVERYTHING and nothing works!”