Wesman no matter what you write about or how you write it you wil always benefit more by at least doing a little checking to find the best form of that keyword to target.
Doing so does not take away from writing in the way you choose to write or what you write about. Say for instance you were going to write about Chili Dogs. You look on Google Adsense free keyword tool and find that Chili Dog only gets searched for 1K times a month for broad search,but also see that Chili Hot Dog gets searched for 5K times a month (hypothetical numbers here).
Upon a little further looking you also see that advertisers are paying an average of $3.00 CPC for Chili Hot Dog versus $1.50 for Chili Dog. This number is not an exact indicator of earnings potential,but it's likely the higher the bid on that keyword the more you will earn from clicks on ads the majority of the time.
So you write your Hub and change nothing about your original plan except you have changed Chili Dog to Chili Hot Dog and gave yourself more traffic and earnings potential in the process.
This example may apply to every keyword you could come up with off the top of your head,that there could always be a higher potential form of it available for use.
I too am dirt broke,unemployed and am doing something I always wanted to do in writing about the trucking industry to share my experiences with those looking for a good basic understanding of that business,however I am trying to make money in the process as well.
Just because you change a word here or there to give better money making potential does not diminish the fact that you are a writer. In my opinion as long as you can live with yourself and your work why not make money.