I don't agree with parents being like those described in your OP either, no adult should begrudge a child a chance to be recognised for something they are good at.
But, as a parent of one very academic child, and one very average child, it does very much seem like the sporty children are given by far the most chance to publicly shine for their achievement. By public, I mean in front of the whole school, or at sports day where all the teachers and parents are aware who the best ones are.
Sporty children get the chance to play against other school's teams, will stand out as being good in PE lessons, get to be first in sports day races. There is no such equivelant for academic children. The class may know who the brightest children are, but they rarely get a little moment of glory in recognition for their achievement.
My average child will never be the top of his class academically or in terms of sport, so he will never get any of that recognition for anything. He is very good at being kind and helping the other children in his class, and while he gets a little praise from the teacher and me for that, he won't have a time where he is singled out and allowed to shine for his strengths. But he deserves that every bit as much as any other child.
The schools should work harder to celebrate every childs achievements, and give them positive recognition so they all get to have their time in the spotlight.