Sorry but that's a pretty silly comparison. A boat can easily be sold to another party, sold for scrap, or given away. A mud week at timeshare in Breckenridge not so much.
Ok - since people seem to want to focus on the silly example of a boat, used solely to demonstrate that personal property is NOT the communities worry to find a buyer / sales venue for - lets use one that really does exist.
How many owners of property in Detroit or many other central cities have property they cannot sell? Is it up to the community at large to buy it or even take the ownership, operate and maintain it? No. Of course it may be FORECLOSED on for unpaid fees (taxes) but no city or town or state is required to accept ownership and relieve the owner of all responsibility or guarantee it's sale to a new taker.
Why are some so set that somehow timeshare is a different "thing" than any other property? It has a somewhat different method of purchase and use rights. But the base property rights are the same as that now unwanted and worthless lot in central Detroit that used to be a productive factory producing income, rent & auto products. Hard times hit and the unfortunate owner wants out! We should all accept that into our names via an Association / HOA and pay while he walks away, no? That is the same exact concept but on a larger scale.
House, boat, condo, industrial property or timeshare no one has a guarantee that when they want it - whatever "it" is including timeshare - will have a value and will sell. Nothing and no one has that guarantee.