If one is going to replace their power cord and buy gold fuses, it seems that this is all for naught without replacing the Romex from the outlet to the panel.
By that logic, there should be no need for high quality copper wire and good parts when the utility company uses common aluminum for the high tension lines in the alley that supply our system.
You need to think about the fuse as the weak link in the AC chain rather than picking at the Romex or AC cable.
Yes, changing the Romex to 6, 9's large gauge copper would probably benefit the system but so does the AC cord and fuse, with or without the Romex swap.
When I raced cars there were people who argued that this cam and gear combo would not work and then got their ass beat at the end of the track. Sometimes you just have to get your hands dirty and try things to prove it works.
By the way, the word "Romex" is a brand name, like "Kleenex".