I know these NOFAP lobbyists say some weird stuff (no fap apparently leads to loving yourself more? lol) but people should not write off the benefits of the placebo effect. If they think it helps them, then by all means run with it. The science behind it suggests it may help or hurt a person who stutters, but it effects everyone differently. To some it reacts as a stress reliever which would help your speech. In others it increases the dopamine and makes the speech worse. In any case, if you think it helps you, regardless if its real or just a placebo, embrace it. Do what works for YOU.