No, writing is not like digging ditches hard. Your life isn't on the line like a police officer's every time you sit down to write. There isn't a dangerous flame licking at you like it does a firefighter.
It's brain hard. Trying to come up with the right word, the perfect twist, the heroine's snarky comeback. And that's just the creative phase. Then you have the edits and the edits and the edits.
Sometimes it's hard just to get started whether you're in the middle of a story or the beginning. The fear of failure can seize your brain power and make it impossible to come up with even one word let alone a whole page.
Then (and this is the magic part), other times the words flow out your fingers like a rushing mountain stream. Nothing gets in the way and the exhilaration you feel has no equal. This is what keeps us coming back. What wakes us up in the morning and keeps us up late into the night. This is the joy of writing.
Wouldn't it be nice if we could bottle that feeling up and just pour it out when the writing becomes hard?