How does manifestation personalize?

Ive been seeing tons of stuff recently on manifestation and I think it’s very interesting. I’m curious though one person can so called manifest things into reality so wouldn’t it make sense for not everyone to do it? Is it basically you driving into your subconscious telling you it will happen so you make it happen? I don’t get the part how you can change the outcome of what others do. Like I get setting a goal and achieving it by telling yourself you will but changing how another acts over a thought? Any insights would be appreciated sorry if this has been asked already as well