Indeed, so keep in mind that he has a vested interest in being able to use the FreeBSD feature to efficiently copy a file from a disk into a network interface.

Indeed, so keep in mind that he has a vested interest in being able to use the FreeBSD feature to efficiently copy a file from a disk into a network interface. Having to break stuff into protocol frames or having every byte have compute done on it for encryption foils his optimization. It doesn't mean that his optimization is more important than TCP connection sharing and ubiquitous confidentiality, integrity and authenticity. (Edit: typo)