Nothing wrong with it at all. People have the wrong idea about protection dogs and some others think that dogs should not be trained for that work because they may get hurt in the performance of their duties...
They do not realize that is what certain breeds were created for and if they do get hurt, they fulfilled that purpose and gave their humans a chance to survive a deadly encounter.
As far as alarms and such, I am not sure when the last time you could use one while walking in the park was, so, that is an idiotic statement.
Some others talk about guns and shooting the dog, but, they have never had to break into someone's house in the dark and have never understood how silence is your friend when you do that, not a dog barking its butt off.
Still there are those that believe that properly trained protection dogs are dangerous and hard to handle and require some sort of special training that only few people can get...that is wrong as well, families all over the world enjoy the protection of these dogs, I know for certain that my kids love having a dog that will play with them but can be depended on to protect them and yes, a 7 year old can call the dog off.
As long as you are a mature brained adult, have the right money and know what you want and where you are getting it from, I think that you should be able to own a dog that will protect you with his life BECAUSE IT IS TRAINED TO DO SO, not because "it loves you".
As far as the idiot that claimed that Dobermans were created to "collect taxes"...dogs do not collect anything, they were created by Herr Louis Dobermann to PROTECT him while HE collected taxes.
Hope I helped!
ADD: MW&M...I believe that you may be confused about personal protection dogs and guard dogs...HUGE difference.
One is bred to guard places, weapons depots, yards, etc and it is his own judge, jury and executioner...the other is a SOCIAL dog that can be around anyone in the house, including kids and guests, a dog locked up somewhere would not offer any protection after all.
As far as Military dogs go, I am not surprised at all at your husband's statement as they are the most unstable, anti-social, poorly bred, worst trained dogs on the planet.
There are VERY few Military and Police dog trainers in the world that actually know what they are doing, trust me, I have dealt with them for 30 years.