Balance and locomotion, lower risk of injury, and quality of breathing - possessing a strong neck has an upside for anyone.
If you only train what you enjoy, you will not make progress.
Don’t get locked into one manner of movement or style of training. See where your second choice leads you.
There's no reason you can’t give yourself every possible advantage - starting right now.
Whatever your experience level, getting in shape remains the same - you need the basics.
Is there any case for only concentrating on your strong points? I am going to say, “Yes."