Nope you're just old and old habits die hard. I do the same thing with my wallet. You can look at a pair of my old jeans and you'll know where my wallet is.
I have an iPhone 11 and wife and son have 12s. We have a rack in a closet in the house where all the car keys get hung up.
The Airtag is for useful idiots who can't remember where they left their car keys.
My wife's Nissan doesn't even need a key as long as she has the fob in her purse which she never leaves home without. lol.
Just clicks on the door button and the car unlocks. Push the start button and away she goes.
Now if they could invent a micro fob to help me find my glasses I'd be a buyer.