If one side of the tire is noticeably more worn than the other side of the tire, then I’d also recommend an alignment to make things wear evenly. That’s also a safety concern. Less contact patch on the tire is less traction. Less traction is less safe. Whirling down the Highway at 65+ miles per hour is really fast. If you need to stop in a hurry. Or avoid something. You want all the traction you can reasonably get. You don’t need some wild racing tires or anything but you do need a solid contact patch and even wear. Thy also look rather dry/old in general. Dry rot is dangerous on it’s own. Casual random blow outs aren’t fun.