The reason this upsets me: I see quite a few people flounder because they feel they still haven't found what they love.
Because sooner or later, they always hit that dull moment. And so they just jump from one thing to the next, disappointed that they just can't get to that mythical sweet spot everybody mumbles about.
I'm not saying willpower yourself through years of drudgery. I'm just saying that there is nothing that will you infallibly get out of bed and motivated every single day of your life. There'll be dull spots, there'll be lulls, there might even occasionally be a dull week or month.
If I read things like "The writer gives in to the joy of playing with words, moving past the aggravation", I want to scream. The writer often struggles with words, and occasionally hates having chosen that profession. And yet the good ones stay with it. Entrepreneurs notice long days, and they occasionally wish they didn't have to suffer through them - but they're compelled to still build that vision. (And some days, the only thing that compels them is knowing that their business might run into trouble if they don't go to work)
I've had the privilege to know world-class people in several different professions. They all occasionally hate all the hard work that goes into it, but they continue it. Not because they "love" it, but because they're compelled to excel at what they do, and they're already good at what they do.
What they love are those few, precious moments where they are at the peak of their craft, and everything seems effortless. What they know is that you pay with a lot of hard work for each of these moments.
Willpower is useful, but not always the right thing. Many of those with willpower stick with something long past it making sense to do so.