I showed up to diagnose a noisy water system in a home. What I found was that their system was shark infested. No fewer than a dozen from the main stop out to a hydrant branch. Tees, 90s, MIPs, a shark bite PRV.
The noise was a hum that could be tuned by adjusting the flow on the kitchen faucet. I found that they had left several of the inserts in the fittings on this copper system.
I carry several sizes of shark bite caps. At the end of the day, they're so nice! I also carry couplings in case I need to replace a hydrant in a cramped location. As long as you secure the hydrant, this is perfectly acceptably to me.
Anything can be good in moderation.