Left or Right hand reel retrieve...tec hnique or obliviousness.
If there is a reason, there is a narrative that will sound convincing. Whether it's objective or subjective, well I do what I feel like.
Let's start with spincasting first. It's the youth set up. If you know Zebco, then you know. First, it's primarily a right handle retrieve. Next, while most people are right hand dominant, it's also a right hand cast. From the day that our human ancestors knew how to throw a rock, a spear, or even swing a club with the right hand, so biological evolution favors our present day right hand dominance. How weird is it, that then we switch the rod over to hold in our left hand. Our right hand is just more deft at that rotaional movement to work the reel handle. Since most of us, do that, we have muscle memory of just doing that.
Next the open face spinning reel. It's just called a spinning reel today, but before that, there were closed face spinning reels very much like the spincast reels. Some people may even know that some of these were mounted on the left side of the rod, not directly under it. Yes, the line came out of the left side, so the handle was on the right side. Anyways with todays modern spinning reels, they come with the handle mounted on the left side of the reel. Again, it has something to do with right hand dominance. The function of opening the bail and then right hand holding the line before the cast. Even the function of the rotor in rotation is designed for right hand dominance. So suddenly one is now fishing with the rod in the right hand and then rotating the handle with their left hand. I don't do that, well it's awkward as my muscle memory from the spincast is not cooperating.
Now moving over to bait casting reels. We go back to having the majority of the reels with right handle retrieve. Again the design in that we cast with our right hand, then swap the rod over to our left hand afterwards. It's weird, but not really since that's the norm. Now there's a variety of left handle retrieve bait casting reels out there too. So that means casting with the right hand and the rod stays in the right hand. That's the gist of it.
Or not. Why can't we cast with our left hand, the rod stays in our left hand, that leaves our right hand to do the handle rotation. That sounds correct for me. I do what I feel like.