Yes, although the chances are very small, it is much better to have just one ticket than none. If I had had zero tickets for a lottery round, I'd buy one, but normally I have hundreds of them from my WoF spins.
I do not see any bigger logic in that - except the fact that because of rules, each newly generated/bought ticket lowers others' chances. I just do not see point in doing something you are not fully engaged in. It is just spending money without any sense (for me), as real chances are so low that is it is really difficult to have any hope. I would love to disable lottery tickets completely, but unfortunately it is not possible and I still receive them from WOFs.