You may have noticed already that I disagree with your reasoning for using a drive-thru, but you are not wrong that they make life easier, and I'm not even saying that you shouldn't use them. I'm just saying that kids can handle a brief bit of cold.
As a person who became disabled a few years back, I wish many, many more places would have drive through or order and pick-up without having to get out of your car. It's a valuable service. I just think it's over utilized by people who don't need it, which is bad for the environment and not great for how little exercise people already get (walking from the back of the parking lot is not the end of the world, people).
The pandemic was kind of a lifesaver for a lot of us. Suddenly delivery options and order for pickup options have become available where we used to have to struggle to go into these places. It's great. It's not great for the environment or for most people's health, but it's great for those who really need it.