If we choose to use ladders, then we choose to accept that there are risks involved. In my humble opinion if a ladder is used correctly with regard to angle, not over reaching, three point contact or placement on slippery or uneven ground etc., the use of a ladder is as safe as its user.
I also would point out that because I use ladders to clean windows, does that make me any less a 'proper'window cleaner than one who chooses to use alternative methods? I think not, as I have well over 400 customers who are loyal and satisfied with the standard to which I clean their windows.
I should add that I never rush about to the detriment of my or anybody else's personal safety. If a window cannot be reached with a ladder, I tell the customer and they are always OK with that.
With regard to trad window cleaners being left behind, I don't care if I am. My
customers are not all going to cancel on me for the sake of technology, so as long as I can continue to do a good job for them and make enough to live on, I will be content with that.
Best wishes,
John.