As I understand it, a printed circuit board is needed to connect microcontrollers, modules, sensors, etc. so the wires don't get in the way?

Question

Do it yourself

Is it dangerous (for electronics) to make your own board or to entrust it to others?

Answer 1

For electronics - not dangerous. But in the handicraft production of the board, substances that cause corrosion (ferric chloride) or other, more dangerous chemical compounds are used, careless handling of which can ruin clothes, furniture, dishes and other things.
In addition, the process of preparing the pattern of tracks (wiring) of a printed circuit board requires both theoretical knowledge and the ability to handle CAD (Sprint Layout is not offered).
The main advantage of the board in front of the bredboard is the reliability of the connections and the quality of the design, as well as the best performance of the connections, which are not susceptible to interference.