Hmmm...well...yeah, this can be really unfair...but...I think that coaches just don't want to risk at training slower athletes cuz they don't know if it's gonna pay off...cuz in the end, if slower ones won't get faster, then it's all just a waste of time. Idk...of course it's not fair but...that's how it is, I guess...unfortunately...
As for the talented ones who don't work so hard...well, they realise that they actually can afford to be lazy since the speed has been given to them...of course working hard wouldn't harm them but...these kind of kids are just the lazy ones...maybe they even don't want to run or anything...they just have to since they can...that's what I think, though... That's why coaches want to motivate them or whatever, Idk...
Of course not that talented ones need coaching...if they can get it...