If I shoot a pile of three shot groups, out of my three shot rifle, then of course they tell me something. They tell me how a magazine full of bullets from my gun is likely to group.
We're not exactly trying to split an atom here. Knowing how my four shot hunting rifle will group after I reload it 1.5 times is statistically IRrelevant to me as a hunter. ___________________________________________
No doubt that ten shot groups give you more data to consider, but at what point to you just not need the data?
A true test of my car would be to see how it performs at high speeds on wet roads. But I don't drive 120mph on wet roads, so I never cared to find out just how well it can "perform".
Same / Same with shooting ten shot groups from a four shot hunting rifle.
