The circumstances do matter here. First, electric cars are novel which means the market is susceptible to FUD, and manufacturers like Tesla have to be sensitive

The circumstances do matter here. First, electric cars are novel which means the market is susceptible to FUD, and manufacturers like Tesla have to be sensitive to their customer's fears even if those fears are overblown. Secondly, I don't know of any conventionally powered car that can be permanently ruined simply by parking it in a garage for a month, unless that garage is on fire or underwater. For every other vehicle on the road, a reasonable person would say that leaving it parked in a garage is taking good care of it. It's up to Tesla to overcome the cognitive dissonance that comes from the idea that simply parking your car for a long time without plugging it in can actually destroy it.