I think this is a good point. But isn't it also true in the case of bolt rifles that these companies historically used "bought in" actions? I don't think it's a strike against them, anymore than I think it's a strike against Rigby. But I believe this is the case.
I know I was in the H&H store in New York in the early 90's and a salesman told me they used Dakota actions for their left-handed rifles.
And while I don't question for a minute the quality of current Purdey guns and rifles, something about the fact of their being owned by a fashion conglomerate leaves a bad taste. Rigby is owned by a firearms conglomerate, as is H&H.
But Rigby's are unapologetically in the thick of African hunting and conservation in a way Holland's doesn't seem to be. Of the three, I'd rather put my dollars there. Plus, to be fair, my dollars go a little farther.