This is literally throwing the baby out with the bath water. If we couldn't depend on other products to make our own product, then the computer industry is pretty much dead and we'll all have to go back to farming the land (and, if you're in SoCal like me, even then you'll have to depend on the mercy of our northern neighbors for water).

I think what you mean to say is "don't build a product that depends on LinkedIn", and to that, I absolutely agree. LinkedIn, with its chain email spamming and forced mass invites, is literally the post-child for internet dark patterns and unethical behavior. Furthermore, the sheer volume of people on there automatically force recruiting agencies to use bots (or at least copy-and-paste) to spam folks on there, and in general leads to bad returns for the recruiter and tons of spam for you the programmer.