I'm with you and @Everest with that. I also run my hand over the surface to feel if the tread has any sharp edges to it indicating incorrect toe alignment.
Another thing I learned from my father was, on a long journey when you stop for a break, put the back of your hand against all the tyres and the wheel centres to see if one is hotter than the others.
If one tyre is warmer it indicates a loss of pressure. If the wheel centre is warmer it could be binding brakes.
You use the back of your hand because if there is a problem and it's really hot and you burn it you won't be able to hold anything. Also it keeps your palm clean.