I would also add that many of these types of window cleaners could master a waterfed pole in no time....
The waterfed pole guys however would take months to learn how to use traditional equipment effectively to earn enough
I disagree with you there.
Look on this forum in the search bar "WFP problems" see how many topics there are? Thousands. Then there are far fewer "trad problems"
Why?
Because it's easier to get a good finish trad than it is WFP.
I regularly see guys who have been WFP for years still not rinsing properly or reading a window wrong as in which rinse pattern to use.
Within a day or 2 you can "master" a squeegee, but I would say even now after 10 years of WFP I'm still learning.
Let's face it, you soap a window, squeegee it off. But with WFP you've got numerous issues you have to be aware of;
Hodrophibic/hydrophilic glass
Window vents
Marks that require extra scrubbing
Drain holes in certain hopper type windows
Dodgy Rubber seals you have to be able to spot
Oxidised frames that require a glass only final rinse
Painted wooden frames where you have to leave the top frame bone dry
....to name but a few.
Please don't tell me trad is harder to master than wfp. Lol
I use both by the way, I have some runs where we still use ladders because of access, but I can see that it's much more difficult to get a perfect finish WFP than it is with a squeegee.