that's how you and TheWho operate. The rest of the contributors here do not do it that way.
I was being a little bit tongue in cheek (but I'll take the Who comparison as a compliment; The Ox and/or Pino are monster players

).
There is actually a third option.
On the highway (to continue my analogy), there is someone whose job it is to tell drivers to slow down: the police.
In music, that role is filled by the band leader, producer, and/or sound engineer.
So, if you are the person leading the band, writing the checks, and/or running the mixing board, then by all means dictate to the guitarists how they should set their EQ and volume controls.
On the other hand, if you and I are "hired guns" or we are in an unpaid hobby band of equals, then you control the knobs on your amp, I control the knobs on my amp, and let's make some noise, blow off steam, and have a good time.
Back to the OP's dilemma, the solution is probably as simple as: it's time to appoint a band leader in charge of the mix, and/or bring in an experienced engineer or producer to help shape the band's sound. A "mix cop" if you will.