Can learning shooting guns improve your archery?
- Yes, it will teach you focus, concentration, and aim.
Can learning how to make coffee improve your tea making?
- Yes, you will learn precision, and about the importance of water temperature.
Can learning French improve your English?
- Yes, you will learn about grammar structure.
Okay, it is a bit of a circuitous route to learn these things, but having another perspective can also be helpful. Getting back to the topic of cross training, I think it suits some people better than others. Personally, I'm sticking to Aikido, but I'm not going to enforce that personal decision on anyone else.
Mmmm. So you don't learn focus, concentration, aim in archery?
Same for the other two. Thus my point. I would say you can have many perspectives on one thing and many on another but there is a reason they are separate things.
If you want to learn something else then go somewhere else.
If you want to learn more about what you are studying be a better student. Don't blame others, don't blame anyone.
The only qualifier I see is finding the style that suits you and if you have then stick with it until you are very good at it and see all doubts and quandrys as part of the journey.
The grass is never greener on the other side.