Bigger, faster, stronger... that's the general mantra for sports. It's also much more palatable for the (conditioned) viewer to watch--those guys are all so much bigger and stronger than me, that's why I'm watching and they're on TV; emaciated jockeys... not so much.
But back to the clusterfuck that is the future of MotoGP: you reap what you sow, Dorna. Ever since Ezpeleta discovered that 125 x 2 = 250, and that 250 x 2 = 500, the idea that each class of Grand Prix racing is but a progression has been relentlessly promoted. Age limiting the 125cc class devalued that championship, usually relegating it to a battle between a wily 'veteran' (slinking back to the smallest class to grab some silverware) and a pimply teenager, or a bunch of kids riding all over one another (and won by the one who crashed least).
And speaking of age, why is it so important, why does everything have to happen.. right ....... now? Kevin Schwantz was 29 when he won his only world championship, Mick Doohan was 29 when he won his first; Stoner could walk away from the sport having won 5 titles aged 29. Sure, there have always been guys who were just that good that they had great success at a young age (Spencer, Rossi, etc.), but Dorna's master plan seems to be: at 15/16 do a couples of years in Moto3, then a couple more in Moto2, then, bang, you're in MotoGP (and from there you later fall back to Moto2 as an also ran, or--if you're mediocre for long enough--you get pensioned off to WSBK).
Angel Nieto and Jorge Martinez are legends, right? Pfft... how many 500cc wins/championships do they have? They were just too scared to run with the big boys...
Yet Dorna couldn't even get their progression right, with the yawning gap between Moto2 and MotoGP being prime evidence of that. Solution: CRT!