Almost all persons in sport, body movement or professional athletics do have a very strong N2.

They don't necessarily have a strong N1, although some sensorimotor aspects of it may be fine they can be lacking self-care abilities (tending to push themselves too hard for money, take steroids etc); sometimes lacking grooming & aesthetic awareness although a lot of this also depends on other networks; and sometimes finding it very hard to relax.

If N3 is poor, they tend to take risks and get involved in violent encounters and substance addiction; this often occurs when someone is stuck in N2.

On the whole someone with a strong network skill will learn things associated with that network more easily; yes. But in some cases some aspects of a network are strong, but others aren't. Consequently, we occasionally will find athletes who can't dance at all and dancers who are clumsy swimmers, but this sort of 'intra-network' imbalance usually occurs when the person has either been pushed into training or specialized in one thing at the expense of others.

As always, a heck of a lot depends on what order the networks were developed in and was it working for or against biology  :  )

Also, basic physical fitness makes a lot of N2 skills easier to learn, most skills take a combination of networks (for example manual dexterity needs N4), and duration of ability and concentration during performance are affected by anxiety levels, so there are multiple variables here.

Finally, body movement skills are only a part of what N2 does; it's also dealing with spatial skills such as basic 2D navigation, observation, interpretation of some visual and auditory input and integrating information from N1 into its stream of info to N3.

It may seem very complicated, but that's because it's complex. It's actually simple and complex!
One network at a time is the easiest way to get the hang of what they do, but we often find ourselves trying always to jump ahead and see 'the big picture' . That's really good news because it means we're curious human beings starting to put together our understanding of the brain and mind, but it can be a bit difficult at first because there seems to be so much to remember!

That's why the tutorials tend to highlight the 'important bits to remember', so if you get confused, go back to "the white rabbit"  :  )
Best,
AR