Sorry you are wrong. I've at least broken even over the last 4 years. One electrical board for my oven was $400.00 but only $65 service call. Also had a computer board in my washer go bad. Another $350 plus labor with only $65 call out.
A new A/C unit will easily run $4k so, again, its a not brainer.
Fridge is still going strong. Had to replace a light bulb. Going on 13 years. Need to order a new drawer for it if one is still available. Accidently overloaded it with beer
Replaced the heating element and control board for the dishwasher myself.
Cost parts and shipping. Was under $200.
Washer cost $350 and lasted 10 years. I think I was ahead on that one. Dryer was similar. paid $350 for that as well, but the store screwed up and gave me the $700 one. That thing is still going strong.
Stove, replaced the oven element. Didn't cost much. Was able to source that locally. 13 years so far
Flip the lid up and the control board is easily accessible. Couple screws and a quick connect. I would source that either locally or online and just pay for parts.
Ac unit after the initial repair covered by the home warranty worked 10 years flawlessly. Had to have the tech out this year to replace a capacitor. Bill was around $400. That will be the only time a tech will be out for a capacitor. As easy as that fix was, if it ever does it again, I'll source one and replace it myself.
Water heater was replaced by me. Picked one up locally and installed it myself. Can't remember what the new water heater cost, but it wasn't much.
I'm way under the $500 premium per year.
A home warranty is all about perspective and your personal needs.