No you can't sue a paramedic but you can sue a governing body of a sport for how they choose to implement their rules. Clubs can and do all the time. Whatever, the rights and wrongs of the argument we are talking about decisions that will potentially cost some clubs hundreds of millions of pounds. Does anyone seriously think clubs will just go along with whatever is decided regardless of how that decision is reached?
You can sue a paramedic, but you can't sue a pandemic.
Bit difficult to sue a government for passing legislation too, even if that legislation forces you to do something you don't want but can't avoid, and thoroughly pisses you off. Anybody would think that football is the only business that this pandemic is going to cost them £Ms!