The killers are people who sit there with the cable rammed into their stomach bending it at 90 degree angle when using their phone. On the MacBook chargers it’s usually bashing it constantly or tugging it.
I come from a world of RF cables which cost more than a MacBook and have very limited bend limits. What we have is insanely robust these days. Just be nice to it.
Edit: my daughter had my 2010 MBP until recently which the original charger blew up on. After dissecting it the cable was fine but the main IC had cracked in half. No shorts on the cable grommet. It lasted 11 years! What are you people doing to these things?