Of course you can be 30 and give advice. Is there a rule where you have to be a certain age to give advice?

Even if you're 10 years old, you are allowed to write on the Internet and no need to police yourself with arbitrarily "waiting".

Also an argument extrapolated on your own experience of 37 that nothing is figured out is not very good argument against when you can or cannot say something.

Just as Olaf the snowman sings in Frozen II, "This will all make sense when I am older ... 'Cause when you're older absolutely everything makes sense"

I’d argue that this is mostly a collection of other people’s live advice.

It’s more or less a collection of aphorisms that I would find in a book sitting on the back of my parents’ toilet.

You're not wrong IMO. Sticking out a burst of short sentences as wisdom based on... 30. Isn't sticking.

This sounds more like advice that he's gathered or been given that seemed the best to him. I think that's fair. People give young people advice a lot. Also becoming a dad makes one feel quite a bit older. Now it would be interesting to see him reflect back on these in 30 years...

I feel many people are more interesting in their 30s when they are still full of dreams and idealism than in their 50s after two marriages, a mortgage and a lot of hairloss.

I just turned 54 and I'm only starting to figure things out.