Really? My impression is/was that the vast majority of regular posters went to games pre-Covid. Maybe not all games, not even all home games, but a fair number.
A few live in foreign parts, and some are on/off boycotters, and a handful have medical problems that make attending games difficult - but they are the minority.
They/we may not be representative of the views of all fans - people who obsess on a message board are probably not normal, but they are generally pretty well informed and knowledgeable.