https://m.tirerack.com/tires/tiretec....jsp?techid=52
The new tires or good tires go on the rear. I wasn't raised that way, but that's what research proves.
Why is your front end out of whack? Potholes. You hit a curb. You hit a rock. Bad luck.
My dealer has automatic laser-blah-blah-blah-equipment and they do free alignment checks every time you show up. The free report shows every measurement in fractions of degrees, etc. It's not just a checklist.
Mine has been out of spec twice in 25k and I'm due for my free 30k oil change in a month.
My wife's '16 Avalon Touring wore out the cheap 18" factory tires in 20k and needed another alignment - at Firestone - when I had the Michelin Premiers installed.
Alignments happen.