thats wrong and u know it
No, it's not. The GMS [Edit: Betas] aren't supported by Apple Genius Bars. With the betas, there is always the chance of a crippling bug that renders the device unusable. Or you can get app crashes that the developer can't fix because the fix requires an Xcode 9 SDK. This beta has people unable to roll back via a DFU update. If you need to bring your iOS device in for service, even if it is a hardware problem, Apple can, and sometimes does, refuse service if you are running the beta.
Here's my beta strategy: I have it running on my 12.9" iPad because while I do a lot of Real Work(tm) on it, I can put up with the crashes and issues. If something key breaks, I can use my Mac or my iPhone. My iPhone I'm not updating until the GM comes out. My Mac I'm not running any of the High Sierra betas on.
If you truly want to run iOS 11 on your primary device, my honest recommendation is to wait until the second public beta.