For contrast, it took me 10 minutes to change the battery in my car.
Also, it really doesn't take three hours to swap a phone battery, even in our sad state of planned-obsolescence affairs. That's pretty extreme. As I wrote elsewhere in the thread, I did an iPhone and an Android last year and each took less than a half hour. The iPhone was fiddlier, but it was also the first I'd done. The Motorola was surprisingly forgiving. But I agree, gluing mass-market devices together is bonkers and only benefits the manufacturers.
The replacement guide suggests about an hour to complete the task. https://www.ifixit.com/Guide/Google+Pixel+6+Battery+Replacem...
For contrast, some people need YouTube videos with step-by-step instructions to even open the hood of their car. They will take far longer to replace a car battery than it took you. Likely they'll also need to purchase a screwdriver.