DVD movies use DVD-Video format which is the MPEG-2 codec.
BluRay supports this same codec which allows copying DVD movies to BluRay disks:
————https://www.sony.com/electronics/support/articles/00029663-——
Video Codecs:
MPEG-2: Enhanced for HD, also used for playback of DVDs and HDTV recordings.
I have already posted not just evidence, but absolute proof, that what you have said is completely false. Yet you persist - for what purpose? BluRay discs are not DVD discs and vice versa. BluRays are not DVDs, DVDs are not BluRays. Period. That is reality. To say otherwise is false.
Grow up and knock it off. You were wrong.