I understand why beginners may want to have the chords laid out for them, but I would encourage them to try to work them out for themselves. It is an important part of learning to play, and trains the ear to understand keys and harmony.

If they are going to play from written chords, they should listen and try to understand why those particular chords are used and how they support the melody, and not just bash them out unthinkingly. You don't have to understand musical theory (although it helps) if your ear can pick the chords which sound right. However it takes time and effort to learn this, just as it does other aspects of music.

I know several guitarists, at least one of whom cannot really be considered a beginner, who in a session are incapable of identifying what key we are playing in, or even distinguish between major and minor.