Sorry, but I do not understand your logic.
WooCommerce IS a 3rd party plugin and ACF does supports WooCommerce (products and orders), right? So, ACF already supports 3rd party plugin like WooCommerce.
But it doesn’t fully support because some things are missing, like ACF for specific product variations. And that’s the purpose of the feature request.
In my opinion, it would be a nice addition 🙂
