If you aren’t putting on your belt and holster (if you have one) and dry firing, you aren’t building the neuropathways you will need when you need them the most — in situations under stress or duress. It also trains your eye where to look (hint: focus on the front sight), helps train you to get your sight picture quickly and helps encourage your body to pull the firearm up to your line of sight. Your grip and your stance will be put under stress and you will know very quickly when you draw and drive the firearm forward if you loosen anywhere. This helps you know where to tighten up.