Anyone who thinks that Covid-19 will result in lower fares, fees or other concessions, has this wrong.
Travel for the next 18-24 months will likely be by people who really want to travel (as opposed to right now when it is "absolutely must" travel. Those passengers are more likely price insensitive and will pay the $75 if they need to check a bag, so the fee gets charged.
This is exactly the time when a fee increase will not affect net --- stress net --- revenue.