I learned to breakfall in my sensei's concrete-covered basement! So, I learned it well.
Thats the way many of us older Martial Art peolpe learned. It was learn it correctly or get hurt falling. The street has no mats, was metioned more than a few times.
I like to take my students out in the park or to a friends house and practice in the back yard. The grass stains the uniform (sometimes) but the ground gives a little.
To many people seem afraid to learn unless they are 1000 % assured they can not get hurt doing so. Thusly the mats in all the schools , now (plus they look GOOD). The only problem is , one can learn incorrectly on mats and still not get injured, but go out in the parking lot and do the same tech. and see what happens. If you have never fell on concreat or in a parking lot getting thrown, tripped, shoved to the ground in such situation may be a shock to your system