That's not true at all. Someone with cheap power at home will break even much faster than a large mining farm.
A large farm has to worry about a/c, power distribution, and all sorts of overhead. Someone that is mining at home can have a small to medium setup with no extras at all. Sometimes the large farms let miners sit around because they take so long to setup. Someone smaller will be up and running in no time.
You've been here for 3 years and I find it odd you would believe that assessment. I doubt anybody setting up a farm more than 0.1% of the network is mining with electricity at more than $0.10. They probably also have more infrastructure and space to begin with. True a home user mining with just 1 unit doesn't need to worry about heat but their overhead will probably be higher (plus they probably paid more than somebody buying 1k Neptunes for example).