Most guitar players that I know are lazy and don't bother learning
the simplist things about their instrument.
They can go forty years without moving past a basic triad.
Forget tabs. It's a useless notation system for lazy people.
I have learnt guitar and am constantly having to demonstrate
to the 'guitarists' the right chord to play, or some nice alternatives.
I sometimes look on Youtube to get some ideas about a particular
song, and I am astounded by the videos people put up there with
the wrong changes.
One guy who advertised his video, as an 'advanced jazz guitar'
lesson was calling out the chord names, but in some cases he was
wrong, such as E-7b5 for a D-7b5.
And with guitar you have limited positions so often you are substituting
one chord to achieve another. I see these guys don't even realise they
are using a substitute. For example they play a B-7b5 for G9. Then
if you ask them to play a B-7b5, they will say they do not know how to.
Another chart had G-6 written instead of E-7b5. Same notes, certainly,
but the G-6 made no sense in a II-V-I in a minor key.
I apologise to all the extremely fine guitar players out there whom I admire.
However, it's the other 90% that drive me crazy.
Tabs are dumb.