Cooper tires sidewall damage

Should I be worried , do they need to be replaced.
They only have 5k on them , I got a alignment and tire rotations last week , they told me my tie rods needs replacement. I changed the tie rods this morning and seen my tire like this .
This was the rear that was rotated to the front , only driven on it less than 100 miles , since the tire rotation, it was rubbing on the spindle bad .

 

I have seen lots of tires with a lot more sidewall damage than that last until the tread was bald. I personally would run them and not worry about it and I am anal about safety and maintenance. Worst case you can just run it only on the rear and a blow out would not be catastrophic. But IMO it looks fine.

 

I’ll take it back to the tire shop to see what they say next weekend , since I’m need alignment again.
This tire here was the one that was in the front for 5k miles now rotated to the back.