Half the products we have bought have had full internal teams to support. And many don't suite our needs, so we have enitre development teams building abstractions that are more complex than the product we bought so we can use the product we bought. And some of those abstractions have been in development for 2 years so no one can use the product yet.
My only point is that buying vs building is complex. When you boil that down to a tool that essentially says always buy, it causes a bit of PTSD for me.