When I joined Nirvana, I was the fifth or sixth drummer - I don't know if they'd ever had a drummer they were totally happy with. And they were strangers. There was never much of a deeper connection outside of the music.
When you have kids, you see life through different eyes. You feel love more deeply and are maybe a little more compassionate. It's inevitable that that would make its way into your songwriting.
I don't think of Kurt as 'Kurt Cobain from Nirvana'. I think of him as 'Kurt'. It's something that comes back all the time. Almost every day.
The most important thing is that you honor that musical integrity, whether you make music that sounds like ABBA or you make music that sounds like Void.