"Smart" video doorbell and surveillance cameras

Is a LAN cable on the doorbell not dangerous since one could be attacked from outside via the LAN cable? (but I don't know much about this) If it is safe, we will have one installed for the doorbell as well

Furthermore, maybe also how we implemented the topic "Smart Home."

First of all, everyone understands something different under the term "Smart Home."

Become aware of your requirements for a smart home.

Our personal requirements were as follows:

[*]Video intercom system
[*]Cameras in the rear garden
[*]Control of the roller shutters via app (setting scenes that are executed either manually or automatically)
[*]Light control via app and integration into voice assistants, time-based brightness settings
[*]Ability on each floor to control the intercom, lights, or roller shutters if desired

That was actually all for us. Matter was not relevant at that time.

We decided on the following actions:

[*]Have LAN and telephone cables pulled to the location of the intercom system (later offers all possibilities)
[*]In every flowerbed, in every corner, there is now a power cable, connected to a garden socket, to which the consumers are connected
[*]Flush-mounted box behind every roller shutter switch executed as Kaiser Electronic box. Use of flush-mounted radio modules that switch locally (for us Shelly). Basic functions & operation thus without delay on the familiar switch. Comfort functions via radio (e.g., via app, or trigger "In the evening, all roller shutters to the desired position"). The app allows setting up scenes and specifying the height for each roller shutter. Completely sufficient for us
[*]Here we decided on Hue. Certainly not cheap. However, qualitatively in my opinion the most valuable. Additionally, good compatibility in all directions. Mature app and technology. Meanwhile even with flush-mounted modules, which we use, for example, in the main bathroom (the same light sources have different settings per scene "Bathing/Relaxing" and "All fully on")
[*]Execution of flush-mounted box again as Electronic box, LAN cable including RJ45 jack, a POE splitter just fits, which supplies the tablets (here you have a wide choice) with power.

In passage areas, you can comfortably use Hue motion sensors. Where I did not have good experiences are Zigbee light bulbs outside the Hue spectrum. I was forced to use flat spots in the upper floor hallway because the substructure of the drywall ceiling was not doubled (planning error on my part). This led to the fact that normally deep spots (including Hue spots) do not fit without damaging the vapor barrier. Here I had to resort to Paulmann Zigbee LED spots. They were not really cheaper, but still do not work as reliably. Example: the entire light group has different switch-on times. Occasionally a spot does not turn on. It is as if the software hangs. Power off helps. But that is unacceptable for me at that price. I am still looking for a better solution here.

Basically, in planning, we simply considered where we needed to be more generous with the cables or the flush-mounted boxes. Basic functions are always kept classic. Comfort then via app / radio. The costs for this were manageable, and my wife's acceptance has not suffered so far. On the contrary. Meanwhile, she uses the systems more frequently than I do myself.

As mentioned above, everyone has a different idea about smart home. I myself would not call our home a smart home. Rather a classic home with modern possibilities that bring us the desired comfort.