Time constraints add drama. The public likes drama - who is going to finish first, will they finish, what mistakes have been made to finish in time.
Some folk just like uncertainty, good, evil, etc. It matters not whether it is a home makeover, cookery, motor race, cricket match or tiddlywinks.
Program makers make their money by attracting viewers. Promotion and the channel upon which the program is broadcast depends in part on likely viewer numbers. For a proper woodworking show I suspect numbers would be very small. Likely to be online rather than free to air.
A thought - improving the quality of offerings:
- a publisher of woodworking magazines to host a quality controlled website
- any videos not meeting reasonable standards of safety and quality would be barred
- articles could be linked to sites showing equipment used,
- videos linked to relevant articles
A sort of symbiotic relationship between publishers, equipment manufacturers and video makes, and a go to site for hobby woodworkers.