How can Visa or MasterCard censor what I can do with my money, especially when it comes to an entity that has to this day not even been charged with a crime? I

How can Visa or MasterCard censor what I can do with my money, especially when it comes to an entity that has to this day not even been charged with a crime? It speaks to our "obedient sheep" nature that there has been no outcry about this. Some will say: "Well Visa and MasterCard are private companies", which is technically true of course, but when they handle the majority of all private money transaction there are other factors at play.