No surprise. Just like when DVDs first came out many of them were no better quality than VHS because the masters used to press the DVDs were the same ones used for VHS.
That’s also why many movies got released to DVD several times using better or digitally enhanced masters.
I remember in the 80s the debate was Beta or VHS? I could never see the difference, but Beta was supposed to be the better of the two. My uncle swore that he could tell the difference, but I just never did see it. I can’t speak about Blu-Ray, as I have no first hand experience with them.