Is that really true though? If they have the original recordings (which have a much better dynamic range than vinyl) the digitally remastered ones can indeed be more true to the sound of the original recording.

They can be, for sure, but in my experience it's hit and miss. For instance, I believe the CD reissues of Living Stereo records (from the master tape) are very good. On the contrary, I once bought the integral of Hector Lavoe, remastered, and the sound was very disappointing, with excessive highs giving an unnatural quality to the sound. Whereas my experience with vinyl records from Decca/London pressed in the 70s is consistently good. If you're willing to experiment and take risks, you can probably find good and bad everywhere. I was suggesting a disappointment-minimizing path...