Well it would not be compulsory so it is up to the pilot to make the effort, in the same way that IMO it is well worth every pilot making the effort to do more instrument training even if they dont do an IMCr or IR.
The schools and instructors also have their part to play. I suspect if they organised days when an instructor and suitable aircraft were available they would have enough takers.
I would encourage any newly minted PPL who is serious about their flying to manage a few hours with an instructor every year and use the time to push their boundaries.