For a beginner to start on a directional surfboard is like a teenager trying to learn on a stick shift car. It is possible, but just harder.
I think we are off topic now...
But I dont agree, and have returned to teaching (not often anymore, mostly friends) on directionals again, as I find it works easier and better.
You have got more hold from the fins, for one.
And you get a natural motion in the right direction standing natural, without having to stand awkvard with one leg bent (and remember to as a newbee).
Both of above means beginners can ride in a much shorter amount of time
, and avoid the typical "side skipping" every single beginner otherwise experiences on a TT
Furthermore, you have a board with more buoyancy, so much easier to KEEP going when new, and you dont have the kite control yet.
It will even be much easier to learn to go upwind, and get even more "practice" on the water, instead of walking back on the beach
So going back to the roots (we all started on directionals the first many years), makes sense nowadays, where a lot (most ?) ends up on directionals anyways now (or maybe even their only goal, if into waveriding, or a pre surfer or windsurfer, or into light wind kitesurf or racing or foilboarding)
The times are a-changing, great to see that
But as said - I think it is somewhat off topic (or ?)