Well, this is true. But again, if I can't make a decision for myself then I'm not completely free. Even if that decision limits my freedom henceforth, I've made that decision excercising my free will.

Probably your definition of freedom is something along the line of "the right to exercise free will and take responsibility for my decisions, and the ability to do so now and forever". With this definition, restricting your own rights is against this concept of freedom. My definition doesn't have that restriction.