Would like to make a small suggestion that might help you out. I have a buddy at work is learning how to ride and he had something of the same thoughts you did. His worry was about picking lines. So I rode with him and watched what he did. It may not be the same for you but just try it out and see if it helps.
Watching him I noticed that he was working hard to “stick to a line” , which was as MSF teaches you ….Outside, inside, outside. However for him it meant Near yellow line to white line back out to yellow line. I asked him if he realized how much lane he had to put our narrow motorcycles down was. He wasn’t sure what I meant, so when we back out , just before I told him to follow me and do what I did on the straights. Soon as wee got one I started slowing down a touch and started weaving back and forth. Watched him do the same and then pulled over and asked this time instead of doing what I did, watch my positioning and compare it to his sitting in the middle of the lane (which is where I told him to stay) . It hit him that our bikes aren’t as wide as cars and that you didn’t have to rail ride the turns. That the bikes took up all of about 3 feet in any given point (depending on your handle bar width) and had more then enough room to play with in turns.
After that realization we went back out and I noticed his turns were not only smoother but the ones that should have been a breeze for any rider to make with a small gesture wasn’t the scary knee draggin’ experience for him.
The only other thing I had him try out was something I am not sure only cruisers can get away with or not ….so may not apply to all since I have zero sport bike time. However he commented he was not keen on the “push ” to turn idea, said it felt like he was going to “fall ” into it rather then be in control……like someone knocking a bar rail out from under him. So I told him to try and pull with the opposite hand. Like driving a skid steer tractor or dozer. That gave him a much better feel for the bike then pushing did. I still do that at times….great thing is that once my brain grabbed what was going on on the very sharp, faster turns my brain kicks in the skid steer tractor idea and I both push and pull , giving me much more control on a harsh turn. May work for you ….may not.
Some times riding is just a mental game and you need to find safe alternatives to get your brain to re adjust. Is why after year 2 of riding I had started working on looking around while riding instead of straight lining my sight. Get to see so much more scenery that way :^) . Got to be a huge help to for hard banked exit ramps….especially here where the run out of your lane is extremely short and you either go, or go shoulder.