A single, monopolistic market would also be "consumer friendly", given those parameters. Obviously we don't want that, do we?

Getting multiple manufacturers to agree on anything is always going to be a challenge and produce some compromises. But it's still better for the market as a whole, which in turn is better for consumers. I look forward to the chance of buying a single, universal charger with great features that will last me decades, from a vendor that may or may not be a phone-manufacturer. Apple would gladly do their worse to stop me from doing that, if they could.