There is a test for pedestrian impact, it's part of the NCAP safety testing that most cars in Europe go through.
Most modern cars have emergency brake assist as well like a PP pointed out, and other features which are supposed to reduce the chances of collisions in the first place. I don't know how old the car in this case was, perhaps it didn't have those safety features, or they failed for some reason. I'm sure the manufacturer will investigate as well as the police etc.
I think legislation is much more likely to change manufacturer patterns than the individual behaviour of a single consumer, especially when most people aren't even aware of the issues - I don't think we were 3 years ago when we went for our first SUV style (previous versions of the same car were estate!) I thought people just didn't like them because of the petrol usage, but that's not even true for modern ones, they are quite fuel efficient.
I understand from the video posted above (and some other sources) that the trend towards SUV type cars started in US because of the exemption of SUVs from various requirements applying to other passenger vehicles. As far as I'm aware, that isn't something that applies in Europe though so I'm a bit puzzled as to why the same trend is happening here.
We don't feel confident repairing our own car via youtube, we would rather lease one and have it under warranty, which is why we end up with a smaller choice of models.
This is not even to get into the problem that the more SUV type cars on the road, the more people tend to feel unsafe in smaller cars and prefer larger ones.