Powering down a PC via the power button

Let me ask something, when you turn your TV, Microwave, Radio, Copier, Scanner, PC Speakers, Tape Player, etc. etc....do you "not use the power switch?"
And, conversely, if you want to not use these items, do you "not press the on/off button and/or switch?"
For me, I have a desktop pc and use the power switch to turn on the pc but can only turn pc off thru the START function. I have had pc's where you could turn on and off the pc with the power switch and "NEVER" had any
problems with the system hardware or software "UNLESS" I turned pc off while I was still in a program!
Why do you think the manufacturer's put the power switch there in the first place????
This is a no brainer folks, sorry.