And I'll just add a comment for the benefit of "left-handed guitar".

It's nothing to do with being snobbish - it's to do with enjoyment. Not just the enjoyment of the performer, but also the enjoyment of the audience. I also don't really care whether someone uses a cheat sheet if what they're doing is giving a really competent performance and communicating with the audience.

The problem is that, very often, the performers who rely totally on word sheets aren't communicating with the audience or really putting a song across. Not always - but far more than in the past.

I've taught many, many people guitar - from total beginners upwards - and I always agree a simple agenda in each lesson for the pupil to follow. I then wait for the pupil to contact me and say they've got on with that agenda and that they're ready for the next lesson - in their own time. Those that want to get on this way will learn and progress. Their choice.