That's looking for the wrong thing. Us Linux users see things like that all the time: proprietary software has a download page that only lists Windows (and sometimes macOS) but never Linux.
But we don't stop there. We don't look for a reason to abandon hope (or worse, complain idly). We look for a way to run that software on Linux. And usually, it is a lot harder than this case.
>> ocicl (...) only works on Linux
> I don't see a reason why the author(s) of ocicle should lie to me.
Is it not obvious? They aren't lying. They're being clear. As they go on to say, in the very same sentence: ", but adapting to other systems and platforms should not be difficult."
If you'd looked for a way to run it on your niche operating system, like me, you'd have found an easy way. And, maybe, you could have even contributed the solution to the project, as it says two sentences after where you stopped reading and decided to idly complain in a thread on an unrelated forum.