Should winter bikes be balanced before storage, or “value creation” at the dealer?

Hello Polofreunde, last week I had my winter bikes stored at the VW dealer and had the summer bikes installed. Then the dealer asks me if he should even balance the winter bikes before the storage. They always do this right before the storage, so that they do not get in Stess when mounting in the winter. As far as I know this is not necessary at all. I said that then too. Then he said that they only ask, since many other customers too Is this just a “sent method” to pull even more money out of the customer’s pocket, or does it make sense? Greetings Braver Polo