Failed CCTV

CCTV means closed circuit television. At my mothers work her car was scratched hugely. So the next time I was at my mothers work I noticed that there were security cameras around the building. So yesterday my mothers friends bike was stolen so I asked “what is with the security cameras?” And it turns out they don´t record anything that happened. So why didn´t they stop it so it also turns out they don´t even watch it.