Yes, sometimes it pays to know what you're getting into. Our house is 15 years old, and I was going to replace the backsplash. I do & fix most things around the house, and had done a little bit of tile work maybe 15 years ago with my brother, who did tile installation for a while, so I figured I could do this easy. Bought the tile, tile saw, nippers, grout, etc. Watched about 40 videos on how to remove the old tile. Lots of methods, all looked pretty easy.
Luckily, I figured I'd start in a small area - the butler's pantry. I quickly learned that none of the people in the videos were facing what I was. It was utterly impossible to remove the tile without totally destroying the drywall behind. And I don't mean slight damage. Every piece of tile that came off brought the entire piece of drywall behind it. I figured, I was ready to make a mess, and skimcoat the whole thing, but wasn't willing to remove all the drywall, about 50' sq., and replace it. I learned finishing my basement before that I don't like drywall work, and knew safely removing all of it was more than I wanted to do. And even if I was inclined, I'm kind of .... myself and not the fastest worker. My wife wouldn't have stood for dealing with the mess that long.
Got bids from contractors, and picked one. I asked him how he was going to remove the tile, and he told me he was going to remove the entire walls, down to the studs - that if the original tiles were installed directly on drywall, with no primer or paint, it was basically impossible to remove the tile without taking out all of the drywall. Lesson learned. The installation might be easy, but the demo was hard!
So I returned everything but the tile, and now I'm in the middle doing something I know I can do start to finish - painting all the stained wood kitchen cabinets white, saving over $6,000.