You can only use that summer house for 1-2 months per year tops, whereas your life would be passing between chilly winds of high rises and being crammed in subway/stuck in traffic.
Moscow seems similar to San Francisco/New York in this regard - you move there if you want to be where the action is and put up with minor inconveniences. Climate-wise the Bay Area of course wins hands down, but I'm constantly hearing people living in the Bay Area complain about ridiculous rents, homeless, feces on the streets and muggings and in these areas Moscow fares quite a bit better. Grass is always greener.