The adductors can do a lot more for your performance than just squeeze your knees together.
In training, there's what everybody else is doing, and then there's what produces the best results. Results rule.
When you are more in love with your athletes' success than your own ideas, you can start to change the game.
Just because an exercise or protocol isn't for you, doesn't give you license to berate everyone who does it.
If any of these movements are staples of your routine, you can do better.
Developing your balance will enable you to respond to changing environments such as ground surfaces and changes in direction.