It is a problem insofar as you trade more emissions for the next ten years at least for fewer emissions later and you cement in infrastructure for vehicles that are larger than needed. It seems better to me to encourage the use of smaller vehicles, public transport, and (electric-)cycling. For example I once owned a 1992 Renault Twingo. It needed about 5.5l/100km in the city. Why don't we slap a modern engine in a car of that weight class or build even smaller cars? It would be pretty hard to beat their lifetime emissions with an electric 3 ton SUV and they'd use less space in cities, allowing for denser neighborhoods where you need the car less.