I don't think you can reduce tearing with fine muscular control. The physics of cutting are weird; cutting at an angle is different, the chipbreaker plays a hug

I don't think you can reduce tearing with fine muscular control. The physics of cutting are weird; cutting at an angle is different, the chipbreaker plays a huge role, vibration ("chatter") has to be kept under control, and the best way to avoid tearing is usually scraping - where the cutting edge has a completely different geometry from a plane iron. The trend in western planes has been to use speed, the weight and rigidity of iron to cut through wood before it has time to flex, whereas you see those Japanese planes cutting slowly - but again, traditional Japanese wood is softer and less knotty or wavy than the oak or walnut or exotics that are a staple of traditional western woodworking. Look at the Australian woodworking scene for ex., their native wood species are challenging.