We are speaking about learning the basics here, not about how to enjoy. First, you learn them, then you adapt them to your personal desires.
Think about reading; many people read for pleasure, but first, they need to learn the alphabet, then the grammar, punctuation, etc.
Now, I agree (as I said before) that doubles can be easy for many people (they were for me): in the end, the main differences with a single are just the different distribution of weight and the manifold. Therefore, some people can learn them decently with just a bit of mentoring. But this isn't true for everyone.
And, even more important, what's the problem if some people want to learn according to some agency standards because thereafter they want to take courses from them? And even if it was for any other reason, wouldn't be ok?