That is an uncharitable reading of the comment because the person did not ask/demand that the software be open sourced. Instead it provided specific feedback as to why the software did not meet their business needs.

Those needs are not without historical precedent where a company has taken a dependency upon another company that later folded or changed direction or updated the product in incompatible ways or repriced it in ways that changed the value proposition. The decision to only use open source software looks like it was made based on client's best interests and professional experience.