My methaphor is explained in the pharagraph immediatelly following that first one:

When you’re making a purchasing decision on their store, Steam doesn’t tell you upfront if the game has or not their DRM hence you cannot make an informed decision on that factor: Steam most definitelly do not want potential customers to select games on the basis or absence of DRM.

I hoped this made it obvious that I was making an analogy about the way both things are sold, by, you know, me talking only about the way things are sold in the following paragraph and not at all about other things such as the different shipping of physical and digital items, the different storage needs of physical and digital goods, the technical details of how to make it do the things it wasn't specifically sold as supporting or countless other characteristics were, indeed, those two aren't the comparable.

It's you who chose to treat the thing as a like-to-like comparison and then complain that something I barelly mention made my "comparison" break.

I mean, sure, had I made a like-to-like comparison it would've been broken in lots of ways including the one you pointed out.