There do exist some who can learn through reading rather than the hands-on approach. I think a textbook on speaker design would be far more informative than gluing some knock-down cabinets and soldering a couple coils and capacitors. It could be a fun project but I’m not sure how it makes one a better listener.
No one is saying you shouldn’t. I’m saying this could be fun learning experience which gets you out of your head and gives you a hands on feel for what is described. The two are not exclusive, but complementary.
And at the end of the day, if one constructs a loudspeaker that conforms to every textbook ideal, there’s no guarantee it’ll be enjoyable.
No one said that should be a goal either.
The main goal is fun and experience in complementary, not exclusive and not duplicating ways. Sure we can learn all about rocket building in a book but putting your hands on a capsule that has orbited the earth is a whole other way to experience space flight.