People, especially older people, certainly need to take things seriously and be cautious.
I am waiting to see the studies on the long-term impacts of COVID infection and the "long haul" phenomena, though. If this virus acts unlike other viruses we know about, that should be enough reason to be a little skeptical of the stories until we know more. The fact that people anecdotally report that in the long-term COVID caused everything from brain trauma to foot aches is another reason to wait for better studies to find real patterns. There are so many confounding variables that need to be considered. For example, the people reporting long term lung damage. Did they smoke? Did they have a concurrent bacterial infection in the lungs (very common with bad respiratory viruses). Was their diminished lung capacity actually measured or just self-reported?
This will be studied in the years to come.