Everyone's entitled to their opinions, and remember they're all valid; including Squeaky's (Roger).
Even if those views are misguided, biased or just plain incorrect.
All I know is, I've a lot of customers who're more than happy with my work. I'm also earning more and working less. Safer too.
But statistically speaking:
If a ladder user cleans, say 15 houses per day, and has five ladder cleans per house. (Conservative numbers I know), that's 75 ladder climbs per day.
Based on a conservative 20 working days per month, that's 1500 per month.
Over 12 months that works out as 18,000 ladder climbs per year.
Over ten years that equals 180,000 climbs.
That's one-hundred-and-eighty-thousand, at least, climbs in a ten year period and it's probably a conservative estimate.
That's a lot of chances to have a fall.
If you've a young family, how would they cope if you ended up paralysed or brain-damaged?
PS. If any of the calculations are wrong, Wor Little Un did them on the calculator and told me the answer. Her maths isn't the best.