Why we need Samadhi to attain enlightement?

Why we need Samadhi to attain enlightement ? Do people with better samadhi can think more than the people with less within short amount of time ? >experiment of people with low IQ, and high IQ, put them in the same room, and you give them the same job. Rob a bank. You’ll find out that the low IQ people probably do a much better job of robbing a bank, plotting the bank robbery, than high IQ people, who get all messed up with legal implications and stuff like that. - Michio Kaku Is widom something like that ? What is the connection between samadhi and wisdom ?