If there were solid proof of infinite parallel realities for all possibilities, do you think this would influence your decision making? If so, why?

No, whether alternative universes exist or not, only the one I live in matters to this me. And even if I could change universes to go a different way, I'd still pick the option that seems best to me. A universe for each option will then be created regardless of what I pick, but why try anything than the most potential first?