If it was really not your type of work and you are being honest and genuine, then that was a good move. If you are not sold on something, you will never sell that service or product.
If there was even a doubt where its something or that you were scared of or maybe you didn’t feel comfortable because of lack of experience. Maybe it was also you had too much work to take on already. But if you run from a challenge and you even had 1% of you say “I think…I can” then you missed out on a learning experience. In fact, those were almost my exact words starting a window cleaning business. I used to hate anything that wasn’t single pane windows, now Im good with triple tracks, double panes, some storms, definitely single panes, all windows.
But I invited myself to fail and fail often. I enjoy failing because those moments in between you learn, force you to become the authority in your field, and one day you will become the top 1% of this industry. You will constantly fail learning something, and the next step above that is to say “I suck at this” which in reality means you don’t suck at it because you attempted it where someone else did not.
I always tell people “You are the absolute best individual for the job, because you beat everyone else in getting the job.” Even the best company in the world, cannot have ALL of the business, they have a good chunk but never ALL.
If I were you in that scenario and the situation was foreign to me, I would have gave it a shot. Again though, glad you dodged that bullet. But keep in mind what I said, you never know if you will like something that you are scared of. Martial arts was that for me as well, now I am 14 years in and still going. 