With square taper cranks I think the issue is many people under torque them. Which is why you get so many fucked nds square taper cranks. “Do it up hard” is very subjective and if using a normal size Allen key a lot of people will struggle to do it tight enough. A torque wrench that does around 50Nm has quite a big lever which indicates it requires a lot of force, try to get the appropriate torque holding it about 8” from the head and you can see why most people don’t get the appropriate tightening on square taper cranks.
With square taper cranks I think the issue is many people under torque them. Which is why you get so many fucked nds square taper cranks. “Do it up hard” is very subjective and if using a normal size Allen key a lot of people will struggle to do it tight enough. A torque wrench that does around 50Nm has quite a big lever which indicates it requires a lot of force, try to get the appropriate torque holding it about 8” from the head and you can see why most people don’t get the appropriate tightening on square taper cranks.