As the saying goes there is no mechanic to determine blindness. Also, the RP behind it represented a blind person in a sword fight rather well. There was no parrying, there was no blocking, only a blind woman charging and swinging a sword utilizing a set of techniques, and landing a lucky blow.
There is no game mechanic to have a non-regnant king, but that didn't stop you. There's no game mechanic for marriage, that hasn't stopped anyone, including you.
The comparisons are so utterly inappropriate that I cannot discern your intents... Does marriage make one weaker with the sword? Make one any less apt to administrate regions? To lead troops? Marriage is a legal act, not a physical condition. Same with regency.
There's a world of difference between RPing a party between characters and RPing the most badass swordfighter of the world being a legless person with arthritis and Parkinson's.
And for the record, that's not a "saying". As for a blind person charging, she could be easily dodged. It's not because that's how people have decided to RP it that it's good RP.
