I would never use remote start climate function. Nothing is as bad as getting temperature in your engine without immediately driving it.
I have some oppinions and a different point of view about this for you.
Now i can only guess that you have lived all or most of your life in Belgium, AFAIK Belgium does not get prolonged periods of serious cold.
I agree , that idling for more than 30 minutes or an hour is not that great and not neccesarry, but 5-15 minutes ? I dont see a problem.
And i will tell you why.
These and much colder temperatures are a reality for a lot of people in the world. This is even relatively warm compared to Sweden or Norway or Finland up North, and there people also leave their cars outside, not in a insulated or heated garage.
What do you think is the condition of the oil when it has been left 12 hours or so with the engine off. I regulary see, although i am lying as i use remote start, but i have seen three things with my GR MK2 Auto in particular:
When it is very cold, when you turn your dash on the oil will be in -Xc degrees
When you turn the car on it says on the dash: The car will remain in P during the warm up/cold start period, something along these lines, i can try to do a pic later, that does mean i will have to freeze my arse off and get in the freezing car, as i wont have remotely started it. As such it does not even allow to put the lever in to R or D, i think, but i might be wrong.
Third thing, in such cold temperatures traveling even 20-30 kilometers, i barely got my oil and cooling liquid up to work temperature being about 90c.
For most of the 90-100 km/h ride, the temperatures climbed very slowly and hovered around 70c. This was this past monday, i have just done the maintenance and fresh oil.
Just my two cents.
Basically i agree with
@tonic