WTF? You're not torquing a head bolt on a big block, you're putting in a ******* spark plug. So the stamped steel socket that comes with the bike isn't a great socket, it does the job just fine.
V65, if I didn't know better I'd swear you were being an :asshat2: . When I had my Venture for 24 years that's all I used was the one in the toolkit because I didn't want to spend the money on the correct spark plug socket. Now I make a little more money and can afford to spend a couple of extra bucks on a tool. It's just simpler and easier to be able to reach over to my tool box and pull out a ratchet, extension and the socket than take my seat off to get to the tool kit and dig through it and pull out the tool kit socket. Besides, as forgetfull as I'm getting I'd probably forget to put it back in the tool kit and need it out on the road on a trip later. Don't really understand why this bothers you so much. WTF right back at you.
GP