I find the fact that because the game makes room for Inspiration and it provides an example in Chapter 7 under STR where one can call on an ability check for You try to jump an unusually long distance or pull off a stunt midjump as well as in Chapter 8 under Special types of Movement - Jumping In some circumstances, your DM might allow you to make a Strength (Athletics) check to jump higher than you normally can, that it is pretty obvious that the maximum distance provided on the jump is but for quick and easy reference to overcome obstacles and that greater distances are possible through an ability check, if allowed by the DM, without the need for special narration provided by the player.
The Inspiration mechanic alone, reflects that the character is not always functioning at maximum capacity.