I suspect that historically it's not based on a sour-grapes mentality or inferiority complex, but instead on class issues. Historically, rich yacht owners and people who work in the marine trades were drawn from very different segments of society, and a kind of "if we let those grubby blue collar types onto our boats, next thing they'll be wanting to walk into the clubhouse through the members' entrance, and who wants that?" ethos may have been in play.Telling this segment of the sport to fuck off is petulant, short-cited, ignorant and at its heart is based on a sour-grapes mentality / inferiority complex