You are mixing up skeptics and blockers, this coming from a deeply, fundamentally sceptical person. Blockers block any new idea, and there is no way to move or convince them. Skeptics will doubt everything you do - very much like a blocker does - but good arguments can move a skeptic. Basically, I'll just block and doubt everything you say until you fought me and convinced me enough... at which point I will become your best ally.