Home security is much more sophisticated today than it was in previous eras. In the good old days, you generally had to rely on a very strong door and equally strong locks. Owning a watchdog was quite helpful as well. These days, many advanced systems have emerged that further make life difficult for home intruders.
The advent of newer and more sophisticated home security systems does not mean by any stretch you should ignore the old classic models of good doors and locks. Those basics of home security are still relevant. And yes, your guard dog is also quite relevant as well.
That said, you do have to modernize your path to home security.
Nothing is more cringe inducing than a home with huge glass windows and a glass door. You might see a lot of porch enclosures like this on older homes. The better door will be inside the porch. While such a look might be quaint, it is not good for home security at all. You may wish to lose the classic look and upgrade to safer door and window arrangements.
One thing you always have to be aware of when it comes to home security, the basics will always carry you far. If a thief has a tough time opening a window and a door, the thief is going to have a really hard time breaching the interior of your home. However, an experienced thief might be able to break through even very secure doors and windows. This is why you cannot rely on locks (and guard dogs) alone. You will need alarms.
There are all manner of different alarm systems that will trip when a door or window is opened. The quality of these alarm systems will vary depending upon the brand name of the alarm system. There are lower cost alarms that can deliver excellent results so should not automatically assume that only the most costly alarms are the only good ones. That said, you do not want to go too cheap to the point you sacrifice quality. Low quality alarms are not always all that alarming.
You also never want to undermine your own cause. Purchasing great alarms and industrial strength doors and windows and the accompanying locks is a good idea. However, if you allow shrubs in front of your home to grow so high a thief is able to work his magic undetected for an extended period of time, then you are not doing what you need to do to keep yourself safe.
Do you need to take the extra steps and work with a home security service that offers an armed response? Only you can answer that question. However, if you truly are worried about your safety and security, such a service can be enormously helpful.