I've read the same forum and I haven't seen one person who claimed they felt worms kicking or biting them.
People describe their sensations as fetal movement/kicking or biting sensations... as a way to describe what they feel in their body so other members who have been pregnant and have felt a baby kick or felt the same sensations can relate. They are describing the sensation, not the activity.
Nobody cares to evaluate or question the physical or mental health of anyone asking for help. Nobody here is qualified to make a diagnosis. If someone says the see worms in their stool or feel them move inside, who is anyone to question it?
They want to know how to make it stop, so they're given options... they make their own choices.
Some people respond beautifully to treatment and others do not. Some people do have a diagnosis and under the care of a specialist and are willing to share their experiences to help someone else.
Nobody is forcing anything on anyone.