Learning to hype responsibly just means you won't let yourself get as excited because you can't handle the fall after the rise when you end up wrong.
Imagine gatekeeping yourself from being fired up about a 40min Direct made for E3 after last year's got cancelled with all this amazing **** lined up for it, all because even if it's really great but doesn't tick every personal box you have, you can't deal with the fallout of your own expectations.
This community does some weird-ass ****. Personally, I'm hyped up about a number of things that may or may not happen, and even if none of them happen I will just go 'Welp, wasn't what I wanted, but there was a lot of good stuff here' and more on with my day because there are bigger things to get upset over than video games.
You realize you yourself are hyping responsibly, right?
All hype responsibly means is to not throw a fit or act like you were entitled to more if something didn't live up to your expectations. If you want to get excited and jump roof to roof screaming like a banshee, feel free, that's not what "hype responsinly" means, and it never has.
I don't know who told you that "hype responsibly" meant that you couldn't be as excited as you want to, because what you described you'll do it literally what hype responsibly is, mate. What you're describing as the thing that you oh-so despise is "Keep your expectations low.", which literally no one is saying that, everyone is very excited for E3. "Hype responsibly" just means to not act like an ass if you don't get what you want in the end, that's literally it. If you wanna go crazy with hype, go for it bro. I know I am.
You've been on this big "**** hype responsibly" crusade, yet you didn't even realize that you were doing it this whole time, according to your own words, because you thought that to hype responsibly meant to never be excited, or at the very least, keep your excitement low, which, it's just
not. Hype responsibly does not mean, and has never meant, to not have a hype overload, it means don't throw a ****fit if things don't go your way.