The answer to this question isn’t obvious. Is it really more helpful to learn about Jazz or Rock or music theory from a violinist or cellist? What about learning about amplification or effects pedals?
The truth is there is nothing that makes Rock cellists or Jazz violinists more qualified to teach you about almost anything compared to a comparably and (Probably more qualified) guitar, saxophone, or piano player UNLESS they’ve developed real insights and principles into what the unique issues are that string players face and or how to approach the unique possibilities of our instruments in a new and novel way.