I was just about to post the exact same thing. 9 times out of 10 the issue isn't a broken service. It's going to be something environmental. You absolutely must

I was just about to post the exact same thing. 9 times out of 10 the issue isn't a broken service. It's going to be something environmental. You absolutely must have retries. Set alerts for elevated numbers of retries so you can respond when it can't recover on it's own but don't leave these out. You'll just generate alert fatigue for whoever is on call in your teams.