Wholesale prices are published at nyiso dot com, so you should be able to prove that with actual numbers. Right now the wholesale energy price is around 25 to 26 cents depending where you are, so that's about the same as the retail price. That doesn't leave any margin capacity or other reliability costs, or for distribution costs, so solar net metering is still driving retail prices up.
FWIW I believe I ma the only utility expert ever who publicly supported net metering. I did it because net metering provided a subsidy that was needed to build out solar capacity, and because it completely eliminated the risk to homeowners who installed solar. I wanted a similar deal for my clients.
mm