I tend to agree with this statement, as I don't necessarily feel that I have truly "climbed" a route if someone ropegunned me up it (as opposed to swapping leads equally). My opinion.
i fell the same way, but it is also personal opinon, as long as u are having fun it really shouldn't matter, but i don't think you can say u can climb 5.10 if you cann't lead it, for one this really screws up other people, i've climbed with people that "can" climb 5.10 and so picked a route in acordence only to get up a pitch and find out they can't actually lead 5.10 , not that i mind leading but, swaping lead on hard multipitch is kinda nice, especalliy if u can't rap off on any given pitch.