I think what really helps Schmidt's approach is that every one of the players buys into it. You could be the best coach in the history of the game but if the players don't believe in your philosophy you may as well talk ancient greek to them.
Try the same appraoch with the French squad and there would probably be a 10 minute argument, with the entire squad invovled, the first time you tried to sinbin someone. Then Pape would tell the coach to go f@$& himself before storming off in a huff.
A lot of that buy-in had to come from the Leinster players (who had to buy into Schmidt's philosophy in the first place). What you used to hear from players from other provinces is that they weren't sure at first about some of the tactics (like the level of detail), but they were reassured by the boys in blue, and the more they won the more they bought in.
But yeah, you probably have to be predisposed to a certain level of philosophical acceptance. Bernard Jackman's talked a bit about how French Top 14 and Pro D2 players kind of scoff at the Irish organization, calling it Anglo-Saxon, but at the same time the teams have been recruiting Irish coaches (Jackman, O'Gara, O'Sullivan, probably more at the assistant level).
Here's a question: A lot's been made recently of how congested the game has gotten, with bigger and bigger players looking for collisions instead of space. France and England are the most guilty of that in the NH, with South Africa the biggest exponent of bosh in the SH. (England's changed up recently, but by injury-enforced accident.) Ireland has never had that large of a player base, both in numbers in sheer physical size, so they were never going to compete on a collision-only basis.
Isn't their drone-strike kicking game an answer to that development in the game? If the forward pack is so large and generally quick enough to shut down most gaps at the front, it seems they're finding ways of exploiting space in behind with the kick-chase, to the point that even if they don't recover a kick they have so much pressure on the opposition that they leave them disorganized -- which means more space. (A lot of that depends on the speed of the ruck, and Ireland won 116 of 117 of their own rucks against England.)
Maybe it's just accidental that that style of play picks the lock of the giants. Or maybe it's by design. Either way I'll take it.