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.
It's you who chose to treat the thing as a comparison between the details of characteristics I mentioned in passing and did not at all mention further in my explanation.
Your claim that my premise is about the technical difficulty in making one or the other support making them do something they are not officially supported to do is a Strawman.