I’m not hoping to hinder anyone’s enjoyment of the sim, but I also don’t see many people complaining when the Bing Maps aerial imagery is updated to be more recent (removing old features), or a city’s photogrammetry is updated (replacing old, knocked-down buildings with new), or when navdata is updated so old beacons or frequencies may disappear. Navigraph users even update their data still further. But airports?! Hell no! We can only add, but never take away?!
Yes, I can set an airport to ‘closed’ by editing the sceneries; I found out how to do it above. But I can’t cover the whole world, hence the community effort. But you’d all rather have bogus data in your sims, with airports on the world map that haven’t been there for 20 years. Just a perfectly surfaced runway in the middle of an industrial estate and autogen buildings. Or an airport you can’t find because it’s invisible runway (often used on grass strips) runs through a car park. Sure… if that’s what you enjoy 
Look, the community can (and does) create historical airfields so anybody can add them - usually for free - to their sim. Be it ancient airfields, wartime airfields, closed airfields (Meigs, Kai Tak being popular ones) or your small, local airfield, it’s all possible.
For me, where a runway has been left to rot, or the surface is being broken up and reclaimed by nature, or covered with buildings or parked cars, I would like to see that replicated in the sim. I can only do that by removing the ‘stuck-on runway’ that covers up the Bing Maps aerials, making a damaged run look pristine and new. If the airport could be feasibly flown to/from, it makes sense to leave it open. If the runway was ripped up, I’d like to get those updates in my sim as standard. Like we do for everything else…
To the last post above, having a historical slider like Google Earth is a massive undertaking, I wouldn’t even hope for that as not enough data would exist. That said, with the World Hub, people may submit airports in different year configurations, so you could choose the version you want to add to your sim. Maybe even - here’s a crazy idea - the current 2024 version of an airport. The version where it’s been built on and no longer exists. Insanity, I know. 
TL;DR for whole thread:
Would be nice if the community could help keep the whole world up-to-date in line with what Asobo are doing with World Updates, including both improving and adding airports, AND closing/removing old airports. The community folder allows anybody to do their own thing; adding or removing content to their specific requirements. So nothing is truly forced on anyone.
Edit to include definition of the World Hub from the latest newsletter (bold emphasis is my own):
For those unaware, the World Hub is an upcoming tool which will allow any Microsoft Flight Simulator player (i.e. YOU!) to submit corrections and updates to any default airport so that they better match their real-world counterparts.