They have security in mind but they aren't security apps, they don't stop anything from attacking your machine and they don't help protect it and they don't run actively, they require user interaction.
If your machine gets infected some of those utilities are useless. I think the main concern on this thread was prevention, and not cleaning up afterwards.
Security is best set in layers, and while I will say hijack this is probably more of a security app because it allows you to see what is running but again it requires user interaction and you have to know what to look for.
Having strong passwords and requiring authentication for everything is one of the best layers of security you can have. So many people get rooted from dictionary attacks because they use retarded passwords, or leave their passwords blank.