2013 Prius excessive tire wear but good alignment

I'm new to this forum. I'm sure this has been asked before but I can't seem to find a specific thread so I'll ask it here. I have a 2013 Prius 4. The car has 129K miles and all suspension / steering components are original. The font tire tread has about a quarter life left in them but have excessive outside wear. Diver side a little worse then passenger side. The alignment center told me that the alignment was prefect and they blamed the tires. I've lifted the car and wiggled /check both tires, cant feel any excessive wear. everything looks good including the Struts. This seems like a classic worn suspension and or steering component issue to me. I'm debating replacing the control arms and inner and out tie rods. Would this be a reasonable fix or should i look / check elsewhere? Thank you.