Why do communities choose property companies instead of residents' autonomy?

Property companies are constantly developing in China, and many owners will ask about the property when buying a house. Owners' autonomy can also be done! But most owners have no extra time to spend in this respect, and the owners are busy with their work every day. Nowadays, property management is becoming more and more specialized, and professionals are needed in many aspects. For example, elevator maintenance, greening management, cleaning management and safety management all need professional managers. Property is not only for cleaning, but also for technical work. The owner lives in the community, of course, hoping to have a comfortable and safe living environment. If you do everything by yourself, you will be very tired. Now the social division of labor is more and more detailed, and property management is also a new industry.