Why the fascination with subwoofers?


I have noticed many posts with questions about adding subwoofers to an audio system. Why the fascination with subwoofers? I guess I understand why any audiophile would want to hear more tight bass in their audio system, but why add a subwoofer to an existing audio system when they don’t always perform well, are costly, and are difficult to integrate with the many varied speakers offered. Additionally, why wouldn’t any audiophile first choose a speaker with a well designed bass driver designed, engineered and BUILT INTO that same cabinet? If anyone’s speakers were not giving enough tight bass, why wouldn’t that person sell those speakers and buy a pair that does have tight bass?
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So, in my point of view no one with those four subs array really can listen all the information that is recorded in those LP/CD's because are not tue subs, have low bass but not the very low bass like true subs and believe it or not it makes a difference.

R.
^^ I suggest you make a recording with very low bass on it and see. I find that the most useful way to have a true reference.
Dear  @atmasphere  : If the post is to me then I'm sorry but I don't get it. What do you try to say about what?
Maybe you are rigth in your posts but I don't know to what you are refering to.

R.
@rauliruegas Here is the definition of notable (adjective): worthy of attention or notice.

In this context when I read Ralph's statement I felt it was worthy of attention.
Here’s a great vinyl, containing some sustained, 16Hz, pedal notes. They also did a great job of capturing the hall acoustics. It worked nicely, in concert with a Spectrum Analyzer, for testing my woofer cabinets. Much more enjoyable, than Pink Noise. https://www.discogs.com/Virgil-Fox-The-Fox-Touch-Volume-One/release/2356270