Yeah, this is pretty important. I used to lift and there's simply no way that I would make the investment to have all that equipment in my house. In normal times it's incredibly wasteful for each individual to stockpile their own redundant junk, rather than share a common pool with others. [0]
I switched to a more equipment-light calisthenics routine years ago with a few items I have around the house, so the current pandemic does not impact my own fitness routine - but for people looking to get really strong this is no substitute for lifting heavy.
[0] As an aside: this shouldn't only apply to gym equipment, communal resources should be way more common for economic and sustainability reasons. There's no reason at all every homeowner should have a lawnmower, for example.
This has not been my experience at all. I used to have a membership to my local gym for my wife, myself, and their childcare program (basically watch your kids while you exercise for 1 hour).
I cancelled that membership and instead put that same amount of money into buying equipment at home (where I have enough space for it) and it only took me about 5-6 months to get enough equipment to replicate about 90% of my routine from the gym. Now I also don't have to wait in line or spend the time travelling to/from and I can exercise whenever I want. For me it has been way more effective.
And when I'm done using the equipment it's not going to go in the trash, I'll sell it in the local classifieds.
Personally I can walk to my gym, and I get far greater quality and variety of equipment by not having to pay for, maintain and store it myself. There are no duplicate machines at my gym, yet it spans a whole warehouse, and I've used every machine at some point as my programme evolved.
As a renter, when I move I don't have to lug hundreds of kg of weights and equipment with me.
I don't see a problem with lawnmowers but I think maker spaces should be in every city. I can easily buy high quality tools for myself but I have no space in my apartment and once I'm done with a tool it feels like a waste to let it collect dust in a drawer.
There is one big problem with communal resources. Not everyone is qualified to use a tool and communal resources make it easier for unqualified people to get tools and break them.
Joined my local gym. It's packed everyday.
This is not a social injustice. I want to lift. Not chat over sweat.
That's all I'm trying to point out, for many disciplines there is no substitute for equipment. But so be it, these are unique times.
Calisthenics moves on the other hand require an enormous amount of strength and muscle control, something you can't gain from "just" lifting weights.
That said, there are many types of training you can't do without the right equipment, so it's at least a bit more than just wanting to be with others. Strength training/powerlifting/olympic lifting all come to mind. It's often really difficult to keep a rack, barbell and hundreds of kilos of weight at home, and obviously not something people had just lying around in case of an emergency.
There is certainly a social aspect to it as well, I love training with a couple of friends, the atmosphere can't be replicated at home. But like I said, I've abstained, and I would have been hopeful others would have to.