OL manual training and Wear and tear issue?

Not sure if anyone has noticed but if you have manual OL training it seems like any good dev OL will have every single bar cost 10+ points no matter how long it starts. Meanwhile a lot of the lower overall nor mal devs seem to cost 3-5 points like any player at any other position does for most of their stuff. Is there any logic to why this is happening?

Also wear and tear seems to be way different if you play every game vs what the CPU teams get. For example I had CJ2k Jr transfer to me. After 1 single season as a starting HB the mans season health has maybe 35% left despite me sitting him the past 2-3 games(only played 9) and his career health is also under 50% already depsite only 19 total touches on SMU under a CPU team year 1. Meanwhile on another user team Hawaii(1st year on the team) the Soph QB career bar is just slightly above 50% while his season is barely above 50%. So if you take into account that the CPU barely gets any wear and tear regardless of setting his QB has basically been destroyed in 1 single year. 486 pass attempts through 11 games and 68 rushes. Ive tried adjusting wear and tear but it seems liek theres no possible setting to make the users on the same level as the CPU unless the users dont actually play their games and just go with a sim or force win/loss.