Let me put it this way, "I know all I need to know about pipes for an enjoyable bowl."
Now, if I had an interest, I could explore different packing techniques, different bowl materials, different blends, the effects of the different leaf, manufacturers, carvers, stems and bits, all sorts of facets. But, I am perhaps too easily satisfied with just a great tasting, satisfying, simple bowl of tobacco. I'm not seeking nirvana, just a good smoke.
Others here, more power to them, explore many facets of pipe smoking. Often very deeply. Those folks are, for all intents and purposes, still learning. I suspect many, confirmed above, will never quit learning to "smoke" a pipe. They don't want to quit, it's a quest and it's fun for them. God bless 'em all!