Really? You don't think a competitive professional athlete at the height of his profession cares about a historic butt-whooping? Worst loss in Clippers history, largest halftime deficit in NBA history...
It's of course just one loss but of course it's also embarrassing. Wouldn't you be embarrassed if you did something viewed as historically bad/stupid at your profession?
They get some leeway for Leonard being out but 50 point drubbings don't happen often or by accident.