The Uselessness of 30 Day Challenges

I am not sure I understand the logic behind these 30 day squat challenges, burpee challenges, and now the 30 day glute challenge.

Given that we all understand the basic idea of training, how does performing increasing numbers of unweighted exercises (often numbering in the hundreds) on consecutive days for an entire month facilitate change of a specific body part?

And what change is expected? Fat loss in that area? Because it is well known that localized fat reduction is a not possible. If fat loss is expected, should there not be mention of a calorie deficit being required?

Or is muscular development expected in a specific area? If so, then is doing a program of unweighted, super-high-rep exercises for a month really going to be the magic fix? Should there not be mention of the need of a calorie surplus to build muscle?

As I’ve written before, physiques are built over months and years, not days an weeks. There are no 30 day quick fixes. Train accordingly.