Popularity of opinion does not make it correct. The ATC acted responsibly in a litigious society, following the NPS directives closing structures on lands not managed by the NPS and suspending programs that would encourage people to act as if nothing was happening and ignore CDC guidelines. That certificates are not available for the past year is a minor inconvenience, unless the point of completing the trail is for the paper saying you did it and not the experience of it, which I gather is all some people are after when it all boils down.