Why do Tube Amps sound more romantic v SS amps

Tube amps like Class A are preceived 'warm' because they heat the room so nicely!

Having just spent 2 days at Capital Audio Fest and having been in the hobby for 40ish years I continue to be surprised by astonishingly expensive systems that are hell bent on detail retrieval to the point that the individual sounds are so disconnected that it is no longer music and has zero emotional impact.  I'll stay with my ole 300Bs thank you; noting that implementation of design and synergy with the balance of the system is key to producing actual music.  

"Tube amps aren’t more romantic, unless the filament glow turns you on. Small LEDs or neon bulbs will create the same mood."

WAF would suggest otherwise!

In my view, a lot of this discussion gets sidetracked by ambiguous language.

If two people sing an octave apart -- or a 5th apart -- it sounds lovely, doesn't it? Would you call that "distorted", from an aesthetic standpoint? Probably not. But compared to a single voice, it is "distorted" from a technical standpoint.

It's weird, isn't it for something that sounds mellifluous and pleasing to also be distorted? That weirdness comes from the ambiguity of the aesthetic meaning of "distorted" and the engineering/measurement meaning of "distorted." But they're not the same thing.

Is a tube amp distorted, then? Technically, "yes," and aesthetically, "no" -- if you like that kind of aesthetic effect.

Here's something useful from Tung Sol:

"The harmonic content of an overdriven tube amplifier consists primarily of 2nd order and 3rd order harmonics with some 4th order harmonics. The harmonic content of an overdriven transistor amplifier is primarily 3rd order with suppressed 2nd order harmonics. 2nd and 3rd order harmonics are the most important from a viewpoint of electronic distortion. Musically the 2nd harmonic is an octave above the fundamental and is almost inaudible, yet it adds body to the sound, making it fuller. The 3rd harmonic is a musical 12th. Instead of making the tone fuller, a strong 3rd harmonic makes the tone softer. The odd harmonics (3rd, 5th, etc.) produce a "stopped" or "covered" sound. The even harmonics (2nd, 4th, etc.) produce a "choral" or "singing" sound. Adding a 5th to a strong 3rd harmonic give the sound a metallic quality that gets annoying in character as the amplitude increases. A strong 2nd with a strong 3rd harmonic tends to open the "covered" effect. Adding the 4th and 5th harmonics to this gives an "open horn" character. The higher harmonics, above the 7th, give the tone "edge" or "bite."

https://www.tungsol.com/html/faqs14.html
 

Also what I have heard and read, I agree with several in this post that It’s all about the “good” distortion that tubes produce. Pleasing to the ear.