Scraping ice vs. not scraping ice is not a question of remote start vs. manual start. If you want to waste fuel and add idle wear/tear to your engine, you don't need a remote start, you just need to push the Start button 10 minutes before you leave.
Personally, I like the way the engine warms up faster when being driven (vs. idling) and so I scrape the windshield while it's idling and then drive off. The activity of scraping is a good way to get your heart pumping so your body feels warm too. Win/win.
Yeah I suggested remote start for the added warmth when coming in the car which doesn't do much for the icy frosty windshield. I mentioned the icy frosty windshield because I first think of that when I think of zero degree type weather. But you're right, scraping the windshield while the car is running and warming up is a win win
That said I thought there was a tarp/blanket thingy you can buy to place atop the windshield to help minimize snow/ice removal?