Wearing gloves while shooting is not just for show. There are definite practical purposes. I think “Operators” (and maybe wannabe’s) may wear them for training because they can envision times when they may actually have to shoot with gloves on in a real life threatening situation.
If they wear them in cold weather for the 90% of the time they are not shooting, with no time to remove them before a sudden engagement, then it is wise to practice that way too.
I have grabbed black metal magazines that had been left out in the hot summer sun and immediately regretted it. The metal parts of guns can get very hot, either from shooting or the sun. Gloves reduce such discomfort.
If it is not cold but an operator wears gloves to otherwise protect himself during his work, then again, training with them on makes sense.
It is interesting to see non-glove wearing shooters at the end of a day’s 4-500 round shooting course sporting 2, 3 or four bandaids around their hands. Gloves prevent this. In addition to the top of the knuckle slamming tight onto the bottom of the trigger guard (proper high grip), overhand racking 70+ times a day will chew up the support hand.
So, if you shoot just a few mild rounds at a temperature controlled indoor range on each outing, gloves may seem unnecessary. However, if you are practicing with high round counts for serious offensive/defensive purposes where you may wear gloves, practicing that way is not tacticool, it’s intelligent.
Shooting with gloves is different. Being (very) familiar with how it feels makes a lot of sense. Kind of like knowing how to operate a manual transmission. Most of the time, you don’t need the skill, but when you do, you had better be skilled at doing so.