you have to have a WC in each round. If you are the last remaining owner that has not used your WC you MUST use it that round as everyone else has already used theirs up.
If I hadn't been forced I would have taken a RP and then a SP later with my WC. True, however, that the only way I can get a SP is to use my WC for one. So yes, forced, but not the end of the World or anything. Probably not a cause to use the "grr"