I don’t ever recall claiming massive fleets are required. Fleets yes. But stupid, antitanked, lazy freighter pilots are far easier to gank than full tanked, smart ones.
That’s why there are so few fully tanked gank victims. They aren’t gankable with 6 characters. In some cases it’s upwards of 20 characters to gank them.
So yeah, there is a huge EHP barrier to overcome for gankers, if only freighter pilots fly smart.