Why is Yasuo squishy as hell?

But other hyper carries like Tryndamere, Master Yi, etc actually have decent base HP and defenses? Why is Yasuo balanced as a squishy instead of as a bruiser carry like he should be. Let's be honest here. He's not an assassin. No stealth, and no point and click burst abilities. He is a late game hyper carry fighter. He NEEDS to be on the frong line in order to do damage, and yet his base HP is almost as low as Anivia's. This needs to change. Haters be damned. Riot please. Give Yasuo the stats he needs to do his job.

And yes you can argue that his wind wall and his passive negate his squishiness, but other hyper carries have defensive abilities as well. Master hi has meditate to reduce damage and alpha strike to dodge skillshots. And his ult removes slows! And Tryndamere can heal, is invincible for 5 seconds, and can reduce the ad of his enemies to help him survive. So please, don't tell me Yasuo is the only hyper carries with defensive abilities. The difference is, other hyper carries aren't squishy as hell. Master Yi and Tryndamere actually have decent base HP and defenses. Yasuo does not. Why this is I will never know.