Yeah, I get that. It might have to do with the type of gun. On my M9 I can only get the first pad to maybe right up to the first joint when I start pulling the trigger, and then it ends up in the first joint. I might typically use the first pad on a single action pistol, but at that point, pulling the single action in the first joint is not really a problem. But that's the only DA/SA pistol I have experience with.
With Glocks there is a very limited place my finger ends up because it's so small in the trigger guard. And it's always on the first pad. With 1911's I always chose to use the first pad, but the triggers were typically good enough it doesn't seem like it would matter. Lately with my HiPower I'm using the first joint because of how curved the trigger is.
To me they're all different in that you adjust. But one the M9 I don't feel like I have to change my overall grip one bit between the two different pulls. Which is why I don't really agree with him. But he's the man, so.......
Personally, I kind of like DA guns. It has a felt perception of safety to me, even though it makes accuracy at longer ranges a bit more, difficult. Depending on the gun. I'm not really against DAO pistols, but there are so few of them now that I've never had the opportunity to own one. I've thought about getting a Gen III Smith pistol. But we'll see. Might be my next type of gun. I've thought about the Sig P224 at times.