Some of them ask for tips on how to find the time.
You'll find quite a few practical suggestions for that in my books (especially "Focus: use the power of targeted thinking to get more done," published by Pearson).
However, there's really only one crucial, fool-proof way:
Want it more.
The proof of what we really want isn't in what we say, it's in what we do.
If you want to write, you'll find ways to do it.
You'll always have a notebook (or a smart phone) with you and you'll note any ideas you have.
When your friends call you and suggest going out for the evening, you'll say no thanks (at least sometimes) and stay home and write.
When you feel like sleeping in, you'll get up early and fit in 30 minutes of writing.
The specific ways you can find are almost endless. What they all have in common is that you discover them when you want it strongly enough.
On the other hand, maybe you work hard and what you want is to have time to relax and the way you get that is to watch talent contests or people making cupcakes or detectives chasing serial killers.
Maybe you have young kids and you want to be as much a part of their lives as you can before they turn into teen-agers.
There's nothing wrong with that and you don't have to beat yourself up over it. Maybe writing isn't what you want most at this point in your life. Maybe it will be in the future, maybe not.
If so, you'll know...because you'll be doing it.
(You'll find helpful guidance in my book, "Your Writing Coach." You can get it from Amazon or your other favorite bookseller.)