And iOS betas have generally been rough. I remember running the iOS 7 beta on my 4s, then promptly restoring because the OS kept crashing and rebooting. I then tried the iOS 9 beta on my 5s, right before I was to go on an overseas excursion with my students. Bad mistake, because battery life on my phone sucked, but fortunately, nothing else broke. I played around with iOS 11 and 12 betas on my iPad (the first was also rough, the latter worked better, but in general, it's essentially playing Russian roulette with your devices).
I made the exact same arguments you did back in 2013 with the iOS 7 beta on Imore, but have since understood that the general public is not expected to be running around running public iOS betas on their main devices just for the fun of it either. That's why I have stopped doing so with my devices (it seems every iOS beta will break my banking app, and I find that betas are generally no fun until app developers get on board, which is around this time).
So unless your job absolutely hinges on it (eg: you are an app developer, content creator or work for Macstories), my advice is still - don't bother. The initial thrill of playing around with those new features and the slightly updated UI may initially taste like nectar, but the subsequent bugs and instability leave a bitter, lingering aftertaste.