Most of them are in their 40s, 50s, and 60s [0]. For many of them, it's only now that they're reaching the peak of their professional careers. These people weren't major figures at the outset, unlike other actors.
[0] https://www.google.com/search?q=better+call+saul+cast+age&hl...
Stop ‘wasting’ time as you see it.
Keep it simple, and it will be easier for you to stay on your chosen path.
Now for a bit of advise from an older man who ‘wasted’ his youth. Life will give you challenges, and consider carefully how far away from the tree you strive. There is hidden jeopardy in the unknown. Who can you turn to in times of crisis? Who can you trust? To whose advice will you listen? So, make peace at home and with your loved ones first before you take on the world outside.
Looking forward and not backward? Trying to improve the lives for those around me, making things that are useful to people with as little abuse potential as possible, developing my skills in whatever domain that interests me at the moment (right now: piano, music in general) not fret about past decisions (not much you can do about them anyway), thinking about what I'll do today and tomorrow and then doing that rather than thinking about what I did yesterday and the week before (or even longer ago).
I'm happy I'm not a child born into the world today because the amount of distraction is off the scale, making it far harder to do something useful until you realize that you are being manipulated into changing bits on a server somewhere. (Yes, the irony of posting that here does not escape me.)
And John Carmack may be a role model of productivity but it doesn't say anything about how he is as a person.
Time very well spent.
A certain component of wisdom is the mix of pride and regret that gives you carefully considered perspectives to pass on.
It's not fashionable to "respect your elders" for what they may know. And of course what works for one may not work for others. But speaking to the OP, generally it pays to listen to wiser people who are generous with their sincere advice of the "Sunscreen" kind, by Mary Schmich, and you don;t have to be old to pass on that advice.
Looking back I really value those people who had the courage to put me straight about my behaviour when I was a kid. They saved me from wasting some life and opportunities, or taking bad roads.
One good reason to heed it is that it cost those people to learn it.
What you see as "wasted" time might better be called "accumulated wisdom".
Remember it may be that the purpose of your life is to serve as a warning to others :)
Do you genuinely regret the time you wasted on social media?
Then for a start, well done for saying it.
Even at the age of 23 it really doesn't make you a bad person, or "judgemental", or some kind of throwback who "shouts at clouds" to actively say to younger people and to your peers - "FFS get off social media".
You never know who is the person who listens to you, whose life you can help. I often say to young people, you should get rid of your smartphone while you still can. Most give me the roll-eyes shrug. But maybe one in twenty look me back in the eye, and I can see the cogs turning and know I just shifted the needle imperceptibly.
That's my dad.