We have access to lots of knowledge on paper sharing platforms, open course platforms, open-source platforms and question asking platforms and etc, and Tesla opened all its electric car patents in 2014 starting from which year XPeng and FF and many others in China and other countries were founded.
I don't know why we are not afraid of the backfires of knowledge sharing or the late-mover advantage? Does a company need the often mentioned technical barrier to be competitive? In China there was a saying "师夷长技以制夷" which means literally "learn from foreigners to compete with them", then I thought those platforms are very dangerous to be utilized by enemies/competitors.
I am sorry if I asked this in the wrong place again(if so, please kindly let me know where I can post this question). I asked this question somewhere else on StackExchange and somebody suggested that I should consider comparative advantage and I learned the term here but cannot still get my head around how to answer my question using that. Any suggestions? Thanks in advance.