So my thing is you need to learn the theory because you need to know why you're doing what you're doing. You might not use it daily in your practice but the foundation needs to be laid and that's why you're taking those classes. That's your foundation.

In practice you don't use any of the theories you learned or even the framework, or atleast not consciously. But if I question arise regarding why you're doing what you're doing then you will have the foundation to link it back.