Fail logic is fail.

Guys and girls got different logic here because of the environmental and situational factors:

Guy in class, meets a girl, dun find attractive, dun think of her, put her as friend.
As time goes by, guy gets closer to girl, eventually will fall for her.

Girl in class, meets a guy, dun find attractive, dun think of him, put him as friend.
Time goes by, girl gets closer to guy, feels guy being neither dispensable nor acceptable as a bf.
Result, put him in best friend zone forever so that she continually gets good treatment from guy and she doesn't have to commit to anything.
Reason here is because she's a girl and definitely she will have some other sort of admirers who are trying to woo her, so she's got a choice.

Guys when they woo a girl, they woo whole heartedly which at the end, if they don't get the girl, they lose almost everything.