Care to share a few generic examples of such important things?

Unless you have a production plant, where machines have to be handled, maintained and supervised, you're spouting nonsense.

In the typical company you don't need an at site presence. You don't even need "a site". People are not randomly walking in the premises, thus requiring assistance.

Even a maintenance service provider, with teams on the road, doesn't need a fully staffed office. These will require depots, wharehouses, tool shops and locations for physical storage, where people really need to be, but not offices. At best, the boss - you - can be there, if the company is small or have a rotating staffer to receive paper work, if the infrastructure is still resisting to leave paper behind.

Where the work is essentially flow of information and data, there are secure channels to provide workflow and communication, be it internal, inbound or outbound.

I worked at a medical engineering company in the early 2000s and back then we were doing like that, using email, skype and fax machines. Nowadays it is even simpler.