You do you, but if you have a modern car and don’t know how the computer on your car is reading data from each tire you may not know enough to be making a good decision.
A service writer may not know more than the person driving the car. Anyone who has been around cars for a good length of time should be able to read a tire as some of us read spark plugs and many things of that nature.
I'm not saying to match 3 tires with a totally mismatched tire size or anything like that.
A little common sense and taking a good look at the tires and considering where they were on the car and how the car was handling, can tell a lot.
It is a "modern" car, 2019 mercedes S560 coupe and it's been fine with my care.
I just choose not to feed into the racket. If the tires read that they need replaced then by all means, tire rack here i come. But just to feed into "its a liability" when it's clearly fine, doesnt work.