Most of us in the baby-boom generation were raised by full-time mothers. Even as recently as 14 years ago 6 out of 10 mothers with babies were staying at home. Today that is totally reversed. Does that mean we love our children less than our mothers loved us? No but it certainly causes a lot of guilt trips.
There's obviously nothing wrong with selling your art - only an idiot with a trust fund would tell you otherwise. But it's confusing to know how far you should take it.