Agreed. You just touched on one of the oddest quirks in psychology as well. People don't like to have their options taken away. But at the same time they don't want to think about the options they have.

So even though only having two weapons at a time is arguably a killer feature, it would be almost impossible to convince someone that this is true. Another example might be Apple, every time they take away an option and people complain they are arguably making their product better, but theres no way they can convince people that's true.

If people don't know they have an option they usually don't care about it or put up with any inconvenience.