C4D was just an example, i'm pretty sure you can read those infos in blender as well. You could even import your .fbx to med and use the id's, they are probably the same too.

I am not nervous at all It's just raging me if people keep complaining about problems that not exist, even when other people show them pretty much how easy it is.

It's not unity's problem if you can't find your vertices ID. It doesn't offer a modeling tool since you can use whatever you want. If 3dgs wouldn't have MED, you would have the same "problem" finding your vertex id, wouldn't you?
Unity offers you to access vertices by a given ID so that's absolutely all you would need.