It is not uncommon to hear students complaining about studying mathematical proofs of theories. However, I personally love mathematical proofs to the extreme that I prefer it to the applications based on the theories themselves.
Mathematical proofs cast the light on the reasoning steps behind the theories. They empower students to trace the foot steps of great theoreticians.
I love to share this very enlightening talk by the great physicist Richard Feynman. Feynman explains even further why learning more than one mathematical proof for the same theory. The reason behind this is that a completely new theorem can be developed from one such a proof which is not necessarily traceable from another.