To be (Gursikh) or not to be...that is the question

On new years day at a dinner with family the topic of passing Sikh values to kids brought about another interesting discussion. The question was - Is there a need to follow the tenants of Sikhism or just being a good human being and doing things the right way is more than enough.
I guess the answer would be that if you are able to judge right from wrong, love all human beings as equals, see God's light prevailing in all (with kids and family its easy but to be able to see it in all is another story) and be confident that you wont be committing anything that will be judged negatively hereafter then I guess you dont need to be following an organized religion and you may not need a Guru.

Thats what I think. Now lets take a look at what the Guru has to say about the importance of True Guru (will cover who/what is True Guru in another post):

sathigur baajh n paaeiou sabh thakee karam kamaae jeeo
Without the True Guru, God is not found; all have grown weary of performing religious rituals.

baajh guroo ddubaa sansaar
Without the Guru, the world is drowning

baajh guroo sabh bharam bhulaaee
Without the Guru, everyone wanders in doubt

baajh guroo firai bilalaadhee dhoojai bhaae khuaaeae
Without the Guru, they wander around crying out in misery; in the love of duality, they are ruined

andhaa jagath andh varathaaraa baajh guroo gubaaraa
The world is blind, and its dealings are blind as well; without the Guru, there is only pitch darkness

So as we can see there is no dearth of quotations in SGGS on the importance of Guru. But someone might still say that if the end result is the same (we turning out to be better human beings) with or without Guru/God/organized religion then why we need one?
Well for me its easier to just follow the Guru rather than worry about being right or wrong in the end. There is a reason there is so much similarity in the message of all the great messengers that came on this earth. What they are trying to tell people is to Love God and all of its creation and cherish it. To lead a life of bhagti (devotional love) and have an attitude of Jeh Prasad . The question really is that weather we want to walk all the way on our own (keeping in mind what the Guru has said above) or walk on path which has been tested by the Gurus themselves and it works!