Putting aside introverted vs. extraverted varieties for a moment, sensing and intuition are the preference one has for perceiving. That's all. Preferences are not absolute. Those preferences do give rise to patterns in behaviors. This being said, there is nothing that is logically inconsistent about a person being a sensor and absent minded, in their head, forgetful, or whatever. In the larger scheme of things, type is only one thing to consider in understanding how someone might think or behave.
The danger is in connecting the function preferences to traits and treating those traits as absolutes for a given type, which is something Solitary Walker has brought up in the past.
People are simply giving examples of their experiences. That doesn't mean there is an implication that sensors can't experience those exact same things. It simply means that is their experience.
Unless of course the sensors object to the whole idea of the thread in the first place because by implication, it does connect behaviors with type.