How much does a Zobel network and its components affect the sound of speakers?

Finally, some recordings are not playable on systems due to Monte Carlo accumulation of faults in recording, playback electronics, cables, speakers and room.

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Wow.... what a Box-o- jumbled metaphors and kinda sorta mathematical iterative NON-SENSE!!!
 Yeah, less than desirable recording - master work, AND, YES, room acoustic interactions.
I'd strip that Zobel junk out of the system except any Zobel network inside the amplifier(s) that are there from designers mfg. all else begs problems.

Said someonenew who never recorded anything in his life and likely has fan-boy comprehension electronics - cables - speakers - room.

English is also a problem. There are no metaphors in the quoted text.

What makes a Zobel in an amplifier which may be connected to a nearly limitless combination of cables and speakers more valid than a Zobel across a speaker to tame its specific impedance curve?

Said someonenew who never recorded anything in his life and likely has fan-boy comprehension electronics - cables - speakers - room.

English is also a problem. There are no metaphors in the quoted text.
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Ah................. obviously YOU must be a gifted audiophile savant.
My gracious genuflection to your advanced understanding!
ALL cynicism genuinely intended.

My system:
Moscode Minuet in A (G. Kaye updated 2019)
AudioNote cd2
Magnepan T-1D (recoiled) mid-range -> Moscode 402AU (amp #1)
Magnepan T-1B bass panels (recoiled) bass -> Moscode 402AU (amp #2)
Sequerra T-2 ribbon tweeters (only pair made) treble -> Levinson ML-9 (amp #3)
Vendetta Research (J. Curl) X-O

Transcendent T-8 6c19p-ev OTL headphone amp
Light Speed passive pre-amp.
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Me:
Retired
electro-hydraulic servo system engineer - designer 36 yrs. 
FAA lic. AP-IA 42 yrs.
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Thats all to say.

Yawn...

Owning a GT40 would not make me Ken Miles.