Could it be that most hardware vendors feel that their value-add is in software? Or they feel offering something like OpenWRT would cannibalize sales of their

Could it be that most hardware vendors feel that their value-add is in software? Or they feel offering something like OpenWRT would cannibalize sales of their higher end offerings like VPN routers? I will not buy a router if I can't flash OpenWRT on it. It's a requirement for me now.