I've found that people who are insensitive will become insensitive parents and then insensitive old people.
I had a co-worker who was where he was supposed to be when some lady on one of those motorized scooters ran over his foot. She then screamed for him to watch where he was going (idk, does she hit pedestrians with her car and then yell at them too?). Poor kid was on crutches for weeks on account of a broken foot. Never was able to grab her info
That being said, I'm a parent and I hate strollers, before I had kids and after. With my first, I used it a lot, but I've always been mindful and I tried to use umbrella strollers which are smaller when I could. With my second, I was able to wear him in a sling/wrap until he was close to a year. Then I put him in an umbrella stroller. We get the big stroller out for things like the zoo or the mall. In general though, I try to find every which way not to use them.
I don't think you meant SD that parents shouldn't go out. Only that they should be mindful of what they're doing and respect those around them. It's heinous to me that someone would hit your dog

That's just not right! I let my almost eight year old push, but with me, standing next to him, one hand on the stroller, and the second I think he's not paying attention, I take over and he doesn't get to do it anymore. That way I know no one gets hit and I'm aware of what's happening.
Sometimes kids break free. Sometimes parents are frazzled. Sometimes kiddos have special needs that aren't apparent. Sometimes dogs bite. Sometimes people lose control.
But for the most part, I think expecting people around us to be thoughtful goes a long way in making sure we can all share space.