I don't know if I'd necessarily draw that implication -- I have no data; my broader point was more around the fact that consultants have a different way of saying "no" than most people.
People can elect to work on things voluntarily for personal reasons, but if someone asks them to fix or do something for them, then instead of saying no, they might say "how much will you pay me?" It's their time and they're under no obligation to offer it to you for free (though they can voluntarily choose to if they want).