The fact that some specific anti virus can detect it, it's no longer a secret who also manufacture these viruses. But anyway, if antivirus won't be enough to detect these malwares.
I agree that there are a couple of good antiviruses out there but nonetheless, you can't rely on them plus it's not even advisable to rely on them. Your personal carefulness and cyber information are some of the most important things that keep you safe from malwares and viruses. People are often quick to download cracked apps which can be closed source most times and grant random permissions very easily to skip installation prompts.
It's very possible to download a malware thinking you installed an antivirus without your knowledge if you are not careful and informed enough.