This is plausible for wormhole, but for nullsec, it is not.
the reason is that as a member of a fairly large coalition myself, when i get pings for fleets, there are instantly 150-250 people online for fleets. no matter what kind of multiboxers we have, we cannot get that kind of coverage. and if we were to have 1 or 2 people out for the weekend for irl stuff, that would mean not 1 or 2 pilots in fleet, it would be even more crippling at 10-20 even upt o 40 people missing in a fleet.

so the cons kind of outweight the pros for nullsec. for wormhole however, simply being able to get a homedefense fleet of 10-20 instantly is pretty impressive and can definitely help. the reason is due to wh collapsing mechanics that limit the size of invading fleets.