I bet that is loudness wars. You don't have to use much, or any for that matter, dynamic compression on digital sources like CDs. They have to use a modicum of compression when mastering an LP, or you get no playing time. So what you are actually experiencing is an abuse of technology.
Fortunately in the classical domain that is not an issue, as producers and engineers want to take full advantage of the dynamic range offered by digital technology.
I do have a few CDs of some of my favorite LPs, and the dynamic range of the CDs is greater.