The point is that you can't tinker with the modem, fix issues, implement new features, or remove misfeatures introduced by Quectel, if you have to use the blob.

The point is that you can't tinker with the modem, fix issues, implement new features, or remove misfeatures introduced by Quectel, if you have to use the blob. Where the blob is running is maybe only relevant to how much control it has over the rest of the system.