I have a new subaru with 35,000 miles and travel 30 mile round trip to and from

What is your question?

work everyday on I-95 I was informed that I need new tires on the front of my car. I don't understanding how I could need front tires. I also don't follow how the tire are worn in the same place with no pull in the starring or any indication that the tires were worn. My question is how is this possible? I never hit a large pot hold and if I did why is the wear not worst on the side that I hit a pot hold on? I have no tread on both tires exactly in the same location and thickness. I also don't understand with wear of the tire why the last service check which was around 35,000 -7500, The tires were checked and had no problem. Q could this be a differential problem???