It's a fairly niche area, I'm not surprised that you didn't cover it in Undergrad.

I had a class on Interfacial Thermodynamics that covered the theory relevant to this (that I remember almost nothing about other than it having 80 or so 'essential' equations to comprehend in a 10 lecture course), surfactants weren't discussed explicitly in the class but thermo is thermo and applies to all systems equally.

I came across this particular area of knowledge doing some post-doctoral work for an excellent physical chemist who specialised in surfactants.

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The answer that was removed kind of boiled down to 'if it forms micelles it forms foam' with some very vague statements in support. It was poorly written, didn't use scientific language, mixed up cause and effect. Most of the facts weren't wrong, but they weren't factors in foaming behaviour. It actually made it pretty difficult to dispute, which is why I didn't bother to explicitly address it. Didn't want to get drawn into a potential pedantry showdown!

The bit I remember was a dubious claim that seemed to suggest that the air partitions into the core of the micelle, which is completely untrue (but was hard to understand exactly what he meant because of the lack of technical language). FYI when you bubble air into a surfactant solution you are in fact creating a new area of air/water interface along which the surfactant forms a typical monolayer.

Anyhoo! Not a problem anymore.