For production work fixtures can be big time savers. Before I retired I made and sold game calls, a lot of them. I was at a gun show several years ago, a young guy was there selling comparable calls, but his prices were about 2.5 times my prices. I was selling them like I was giving them away. Finally at the end of the second day, he came over and told me I was selling them too cheap, that I wasn't getting anything for my time. He added that it took him almost an hour and a half to make what I was selling for $17. He even complimented me on my fit and finishes, said I wasted to much time on that to sell them so cheap.
I kept my mouth shut, I had been making calls for about 30 years, I did not have the heart to tell him that those calls took me about 15 minutes to make. My time was being paid back at a dollar a minute, or $60 an hour. What took him about 90 minutes, I was doing in 15. It was all because of the jigs, or as I call them my production jigs.
Today, I make them for enjoyment and only for very special people. I take my time, because I can, but back then, money was topping the list of why I was making them, because we had a family to support. If it is a hobby, and you can waste your time, go for it, if you are trying to keep food on the table, sometimes you have to get off the pot and innovate.