To some extent, this is true, since the white paper of bitcoin is the first serious document in the field of ICO and it very detailed and clearly describes all the details of the work and what difficulties can be faced in the future. All other companies took it as an example for registration of the documents therefore to some extent it can be considered if not the Bible, then the Constitution precisely.
It actually has nothing to do with ICOs.
Writing white papers isn't exactly a new concept, and Bitcoin has existed for years before the first ICO was even held. Not to mention that most of ICOs' white papers are just fluff pieces riddled with error, with some of them even being plagiarized outright.
They're certainly different in that Bitcoin's white paper was written to propose a solution for a known problem, while most ICOs' white papers are simply marketing requirements.
Very few cryptos have even followed bitcoin's example. How many are actually decentralized? How many offer a real world solution and provide real value in terms of utility? Just because they also operate on a blockchain does not mean that they are following bitcoin's example, 95% of alt-coins are crap projects just made to get a big ol' slice of the proverbial pie.