Unfortunately, the responsibility is on the user to determine which version is most appropriate for their purposes. Also unfortunately, users make too many assumptions that just because they want a certain version they expect that version is going to have every feature they need. There are comparison charts that can be studied prior to subscribing to determine which version has the features needed. Unfortunately, many users don't take the time to carefully compare features before making their decision. Then they come to the user forums to express their buyer's remorse, and there really isn't anything we can do about it. The user needs to go through the process of switching plans if that will resolve the issue for them.
Unfortunately (in my opinion), all of the advertising about Lightroom emphasizes the portability of the images and the ability to edit those images on all your devices. Lightroom is an excellent tool for that. There really isn't a chart that compares the actual features in the two different versions anymore. At least when I just looked I can't find it. I regard Lightroom as a lite version of the program. After I have created an album and have done most of the major editing using LrC, I will occasionally do some minor adjustments using Lightroom. But I personally prefer LrC for my serious Lightroom editing. Others may disagree. That's just the way I look at it.