Two Microwaves

I have two microwaves in my life that have design features I cannot understand.

The first, pictured above, is at my house. For some reason, you have to press "Time Cook" to get it to run through a timer. I understand the manufacturers were trying to create a distinction between timed and auto cook, but honestly, shouldn't time cook be the default? And then, whatever else can just be a special button. 

The second is at my office, and it beeps its full cycle of end beeps regardless of whether you've opened the door. What is the point of that? Yes, I get that it's an extra check for the manufacturer to test if the door is open. But pissing off your users is probably not the best alternative feature.

Also, I want to know what possessed the person above to post that video.