I used to always dirtjump in knee pads but no helmet
Similar story here. Jumped and rode halfpipe/mini ramps for years (20+) and only ever wore knee pads or shin pads occasionally. Only wore a helmet once (my mum made me when I got my first BMX in '82 – sold it later that day 😆 . Despite falling off many times each ride, I never once hit my head.
Only took up mountain biking a few years ago and never wore a helmet or pads. Most of the guys I met on the trails were padded up and I decided that I should maybe get a few pads myself (helmets and knee/shin). It took a good few rides to get comfortable with this stuff attached to my body. First time riding with a full-face helmet was scarey – claustrophobic and I found it really hard to breathe. I'm used to all this stuff now and feel naked if i'm not wearing some protective kit, but prefer my pisspot lid to the head chamber.
I guess not having safety equipment for all those years, forced you to learn how to read the signs if things were going pear-shaped, and act accordingly. That, and learning how to minimise the impact when you did crash are lessons that have stood me well over the years (although I still get caught out trying to knee slide on dirt 😳 )
I don't rag on riders not wearing safety kit. They may learn the hard way, but if they're as lucky as I was, they wont learn at all.