I didn't say 1 hour to cut a trim. That would be stupid.
I said "To put this into perspective, a window reveal that needs a bit of squaring up (they all do right?) with properly mitred trims and consistent gaps all round will take me most of a morning. Just getting the trims right will take me about an hour"
That means all 4 trims, mitred on each corner, consistent 1 to 2mm gap (depending what we're aiming at) all round the edges, tight virtually no gap on the mitred edges and stuck on so flush with the main field, and then adjusted all round to be as good as I can get it. If the window is out of square, then the reveal might have to be filled to level up and so on.
I've seen such work round here so I know others do the same.
An hour could be at most, but say 10 mins a side wouldn't be unreasonable for me at least.
If you can do all that faster, good for you but I can't in order to get the finish I deliver but then I don't tile every day only about a week and a bit per month.
If I could find a tiler that could do the work I do, faster and cheaper, when I need it, I could sit at home or be doing something else and make money.