Seriously, are there no entrepreneur stories that had a great idea from the beginning, executed them smoothly without any outside financing and achieved success

Seriously, are there no entrepreneur stories that had a great idea from the beginning, executed them smoothly without any outside financing and achieved success? Of course there are, but what use is telling people that they can execute smoothly and be successful (without outside funding) and everything will be great when this isn't how it works for the majority of people. I understand that being told that its hard and you will fail is demotivating, but telling people otherwise isn't going to help them because it is hard and most people will fail many times before they become successful. Maybe it should be seen as a perseverance test - if you can still stay motivated after being told these demotivational things, then its an indicator that you might just have what you need to persevere and make it. The 90% of startups failing thing is true - I see it all around me, I even experienced it myself. You may think it doesn't apply to you (as I did in my previous startup), but chances are it does. I think its best to prepare people for this reality and help them persevere and learn and become stronger. Even if its demotivating...