Well, I've got two good reasons !!
I've had two brake line failures on motorcycles, with OEM rubber lines, both at 10 years in service .
Both failed at swaged on fittings .
All of my bikes have braided stainless lines .
Cost for stainless lines is not far from OEM parts prices .
I've replaced all of the OEM rubber lines on my three cars as well, with braided stainless lines .
They range from 14 years to 35 years old .