Of course, we expect this pandemic can be over soon. It is not only about seeing a football match live in the stadium but we also need to be free to do all activities as before. The pandemic even makes many football players must be rest for a long time because of affected by Covid-19 and many football clubs may be in a financial crisis because they have a limited way to gain money right now.
Having a few live audiences are now being practiced at some game matches. Not that much but at least there's progress and good development.
Covid-19 will be a forever disease by now. It will be like the common flu so our body, with the help of a healthy lifestyle and a vaccine in an emergency, will be used on handling this virus soon.
Back to the pre-recorded audience sound, depends on what sports it is, it's for viewers' purposes only. Sometimes, those are not played in a live match wherein players should hear it.