Generally the saying is that you can't walk to the show and often lower level walks don't translate to MLB unless you have power but more and more teams are loading up on high walk hitters and they even look for walk rates in college ball.
The As are most famous for it but the Astros, Dodgers and Cubs and other teams also have started to load up patient hitting prospect, some of them with fringy hitting tools.
is patience the new 6th tool? Or is big league walks more a combination from being feared and not chasing to many balls out of the zone and lower level patience means little for walking against elite pitchers?
The old saying was that you get toolsy hitters and they learn patience later but the experience shows that free swinging low minor hitters rarely learn patience and walk rates usually only decline above A ball ( although there are some exceptions), it seems to be hard to learn patience as an adult hitter.
on the other hand there are A ball walk machines with limited power, who don't translate their walks to high minors because guys who hit 11 bombs a year usually don't get walked a lot by MLB pitchers because they rather throw a couple down the pipe than giving up a walk to a singles hitter.