What more do you want? Think of how many people there are in the world who want that. Who just wish they didn't dread waking up every morning to go to work. I love my job and I'm completely fulfilled with it. It's all how you look at it - we've made it as far as I'm concerned, anything else is icing on the cake.
Really, the question you might want to ask yourself is: do you even want to be a CTO? I don't, it sounds like a set of skills and activities I don't really want to work on. I'd rather be a good engineer who helps other people grow in their career, who also gets to fish and surf in the morning and play video games in the evening.
Whenever I feel the way you're feeling, I think back to this quote by Kurt Vonnegut about Joseph Heller:
True story, Word of Honor:
Joseph Heller, an important and funny writer now dead, and I were at a party given by a billionaire on Shelter Island.
I said, "Joe, how does it make you feel to know that our host only yesterday may have made more money than your novel 'Catch-22' has earned in its entire history?"
And Joe said, "I've got something he can never have."
And I said, "What on earth could that be, Joe?"
And Joe said, "The knowledge that I've got enough."
Not bad! Rest in peace!
People don't write about ordinary lives normally because they don't get clicks and they don't grab attention. But if you're not seeking attention why does it matter?
It's partially why I enjoy the Great British Baking Show; all the bakers are otherwise perfectly ordinary people living ordinary lives, and they just bake as their hobby and the competition is relatively cheerful. Compare that to most American reality shows where all the people do is live and breathe being a master chef literally every second of their lives and everything is extremely stressful.
Don't sweat it. Just like there are billionaires, there are also these mystical productivity billionaires. It's a cool thing to behold but it's very much not the norm.
Why? It's your life. You're the only one living it. Live it how you want. It doesn't matter what other people do. If you're happy and fulfilled doing the things you do, that's awesome. Honestly, that's really the best most people can and should strive for in their lives. Some people just aren't contented or fulfilled doing those things, that's fine too.
Everyone lives their own life, it's cool to see what other people do and be inspired by it, but no one's really forcing you if you really don't want to. But if you feel pressure, maybe you're not as fulfilled as you think?
It's just that you read online about all these people that do open-source stuff, create their own website/business, build tools, do research etc. that you feel left out and the big pressure to do something meaningful. In addition nowadays you have to do something meaningful for the world, but it's hard to impress the world or the community, because in your community (like the hacker-news, reddit, indie hacker) there are now thousands or millions of people, you have to do something very substantial to actual get noticed.