You wear gloves in winter if you live in a cold enough geography. Why not wear shooting enabled gloves like my new Polar-Ex? my hands will be warm and shooting ready. In winter I'm probably carrying LCR 357.
If you know you're going into a dangerous situation and carrying bigger, wearing tactical gloves has an additional benefit of providing defence against knife cuts too. I'd put my gloves on if I knew ahead of time there was an increased chance of trouble.... SHTF type situation or whatever. I'd probably be carrying 45 Auto in this case.
Every regular day in the summer I'd probably not be wearing gloves and probably have my LCP.
Simple, practice shooting my LCP without gloves.
Practice shooting LCR with winter Polar-Ex gloves.
Practice shooting my XDm 45 and/or Storm 45 with Blackhawk gloves.
I've already tried dry-firing and the sight picture is steady through the whole pull of the trigger, so I don't think it's messing me up. I haven't gone shooting for real yet to confirm though.
If I in fact seem to shoot better with gloves at the range, then might switch to always doing that for my other range shooting guns. If there is a difference and I shoot better without, then i'll just do whatever seems to work best.
I agree with the general point of practicing just like you would in a real situation. I gave you examples of when you might have gloves on and what the advantage is.