I think you are replacing one extreme claim with another.
Becoming better at something means that either your body or your brain have to do do something that it's not used to and doesn't feel comfortable with. It doesn't matter how much you love what you do it's still going to feel harder and thus there are a million other things you would rather do.
When I were young I practiced the guitar 10 hours a day for a long period of time. I loved (and still love) music but it was hard even with this love for my field.
If I wanted to I could simply have been playing things that I already knew. Playing around and not getting any better.
But to become better at something you need to get the discipline to get on with it and that will "hurt".
Becoming better at something means that either your body or your brain have to do do something that it's not used to and doesn't feel comfortable with. It doesn't matter how much you love what you do it's still going to feel harder and thus there are a million other things you would rather do.
When I were young I practiced the guitar 10 hours a day for a long period of time. I loved (and still love) music but it was hard even with this love for my field.
If I wanted to I could simply have been playing things that I already knew. Playing around and not getting any better.
But to become better at something you need to get the discipline to get on with it and that will "hurt".
There are no easy ways to become better.