Buy a new to have on hand and replace it when it does finally break, till then don't worry about it. I got 39k on mine and still counting.
That's like saying just wait until your tire pops then replace it. How about preventative maintenance instead of ruining your trip, your day, and possibly your leg.
Tire vs belt is a big difference
That belt was bad. Could go at anytime. It's not worth the risk. Why put off what you can see will fail.