tbh i’d argue it has utility not just in spite of that, but because of that. if you select the wrong weapon by accident, being able to quickly press l/r to correct this is arguably a faster option than having to back out and reselect the correct weapon. in the same way it also allows a quicker way of comparing the effects of each weapon, which while certainly not impossible otherwise could stand to benefit from the feature
idk, with this sort of thing i figure that redundant options in an interface are usually advantageous, since everyone has a different style of navigating them