The problem with designing exercise programs and diets to appeal to the masses is that you might succeed.
When you make a practice or product popular, what is actually effective and life changing about it has been altered.
Practises that lead to health are seldom popular, that is why so much of the populace is in trouble. To be healthy and in shape now a days means that you have rejected what is popular and are swimming upstream, against the flow and the status quo.
If you are waiting for an activity to be fun before you begin it, you will wait for a long time.
But don't worry, you and your expanding waistline will not be alone. You will be in the company of the vast multitude that please themselves today, yet are unhappy with the consequences of their yesterdays.