For whatever reason, the prevailing myth that comes delivered in every first-time pipe box seems to be the "three pinch" method for packing a pipe. This method invariably leads to overpacking, and most new pipesmokers end up with a thick plug of tobacco in their bowl. This overpacking leads to a draw that seems analogous to puffing on a cigar, so it seems fine to the new pipesmoker.That sounds excellent advice and no doubt has helped many people. It is also exactly the kind of advice I mean in my OP that meant I was so obsessed those years ago with an open draw that the pipe wouldn't stay lit, causing excessive puffing, a burned tongue and much frustration. I guess all advise is subjective to the receiver and how they interpret it. Personally a draw with a little resistance works better for me.
Tobacco (and all burning things) need oxygen to burn. The burning ember of a cigar has air around it in all directions, so the draw on a cigar doesn't affect the ember nearly as much as a pipe. A pipe, by design, is closed off. When you pack a pipe too tightly, the only oxygen you can get comes from drawing air through the pipe, causing a hot pipe and big clouds of smoke when you have flame on the ember, but the ember gets snuffed out as soon as you stop pulling air through by puffing. Pipe goes out, new pipesmoker burns their thumb relighting 3-dozen times through one session, and they put their twice-used pipe back in the box to be forgotten because they "can't ever keep a pipe lit".
Packing lightly leaves enough room in the bowl for air to feed the ember. This allows the ember to stay glowing at a low temperature, allowing the pipe smoker to puff without relighting every 20 seconds. If you go too far in this direction, the downside is that you burn through your bowl too quickly. Easy fix.
So my advice on the draw--same packed as empty--is a starting point to attack the myth of the thrice-packed pipe. As with all things pipesmoking, YMMV.