I find the arguments confused and lacking. Many of those arguments conflate “open source” with “community driven”. Rarely did they make a compelling case as to how availability of the source code would hurt the customers.

And many, many amazing open source teams have demonstrated that even including community driven design in some cases does not hamper the quality of the product. Look at Apple and Swift, or Rust, as examples.

I read their arguments as “we do not know how to engage with a community effort because it’s not in our company DNA” under the facade of supposedly legitimate reasons.