The problem here is that you enter into a contract with an insurance company and they have aggressive claims adjusters who are motivated to minimize payouts. When something happens the adjuster reviews the policy and the fine print to find a way to reduce or eliminate their liability.
Did you tell them you use winter tires and got a discount on your policy for this? From the picture, it is clearly winter time and the tires should be on the car. If they are not, then you misrepresented your intent and took a discount you were not entitled to. People may think no problem here, just charge me back for the snow tire discount I took and pay my claim. The insurance company has a completely different viewpoint on this and their perspective is that the contract is null and void and they are not going to pay out at all, saving big bucks.
You hear a lot about people who have purchased medical travel insurance, did not disclose all pre-existing conditions, paid a certain premium, had an incident not related to the undisclosed conditions and then find their claim denied. Same type of issue.
The average person is in no position to fight back on this as it is very costly and time consuming. They can deny your claim with the stroke of the pen and then the onus is 100% on you to fight back.