While I agree that it’s possible to have a car that will suffer no problems due to an inoperative EGR I also think it varies on a car by car, case by case basis.
A few years ago the EGR tube sooted up in my Lincoln and it would not rattle no matter how hard the throttle was hammered.
On the other hand, when the EGR dropped in one of my son’s cars (Chevy) it rattled like mad before I replaced it, and enough of that rattling is eventually going to start doing some engine damage.
Maybe the EGR problem is caused by a lack of maintenance. It has a rough idle so faulty ignition parts, etc. could be the main contributor to the EGR problem.
If the OP decides to replace this valve they could consider this one.
Assuming the valve itself is actually bad, it looks pretty simple and straightforward to replace; 2 bolts, vacuum hose, and exhaust tube.