It is necessary, but there are some situations where it is not advisable to install a garbage disposal.
The most obvious benefit of installing a garbage disposal is that it reduces the water content of the garbage, making it less prone to odor and bugs, so you don't have to take it out every day. There are three main situations where it is not suitable, those who don't cook often, those who have aged and those who have been clearly indicated by the property owners that they will have problems if they use it.
Kitchen garbage disposal, also known as food waste shredder. In simple terms, you stuff food waste (chicken legs, bones, etc. are fine) in there, and the machine crushes and grinds it, then it gets flushed down the hose.
Personally, I feel that China's current sewers have a very high probability of being clogged. After all, it is unlikely that the city's sewers, which are flooded when it rains, will be improved in the short term. Improvement of sewers is a long-term and huge project, the improvement of sewers will inevitably affect the lives of most people in the city, will inevitably dig holes everywhere, will also be opposed by many people. Of course, if you don't consider the sewer problem, using a garbage disposal should make life easier.