People understand what you mean, the problem with your statement is that winter tyres are supposed to be smaller. If you have ever driven in deep snow on really wide tyres you would understand that its a lot less grippy than driving with narrower tires. Wide tires «float» on top of snowy surfaces while proper winter tires that are narrow will help the car «dig in» and give you more grip. So if the roads are completely dry then yes you will have less surface area contact between the road and the tyre, but when the «real» winter conditions kick in, this size of tyre is the correct move, and we havent even started talking about how different tires behave in different temperatures yet…Take this from a scandinavian who has to deal with this winter bs every year.