I think you misunderstood. We need to warm up our ICE cars. Starting the engines from cold when it's been -15 or so overnight greatly shortens their life. This was realised many years ago and so now virtually every car comes with a way to plug it in which warms up the engine. You set it for a time so it runs about 90 minutes before you think you're going to leave.
An occasional start from that cold won't damage the engine but if you do it every day you're going to have a very expensive repair bill so everyone is used to it as standard here.
Here's an old image from a couple of years back I sent to a friend that asked about it.
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