The problem with this thread is the word "legitimate". Who can define what's a legit reason? Obviously not the OP nor the anti-gear swapping crowd, since based on the title, the thread started with bias already. What others think of as legit may not be for the OP and vice versa, thus the thread will just go in circles.
1. Someone propose a reason and thinks it's legit.
2. Someone thinks it's not.
3. Repeat step 1 and 2.