A dictatorship is a system where a single person or entity can force through changes against the will of the majority. The SPFL could be considered a dictatorship if resolutions like this one could pass on the basis of a small number of influential clubs supporting it, or by an executive decision by the board. Instead, the opposite is true, for a resolution to pass it requires a supermajority of the clubs.
Of course, in this vote it wouldn't matter if it was simply majority rule, since the majority of the clubs saw through this tinpot proposal.