Why can an Australian visa be refused?

After all, Australia is a developed country, with a national pass rate of only 40%, and there is a certain probability of refusal. Visa officers mainly examine the following aspects:

Do you have an exit record? For example; Countries such as Europe, Japan or New Matai.

B What about personal assets and cash flow? For example: personal savings, whether you have a house or a car and other information that can prove assets, the visa officer thinks that rich people rarely stay and have enough assets to prove that you have the economic ability to go to Australia.

C whether there is a stable job, the visa officer thinks that the chances of people with stable jobs staying or working abroad will be relatively small.

D Do you have a happy marriage and family? For example, if you are married and have children, your parents are alive, your brothers and sisters, and your relatives are in groups, such family information is the best, because these are all factors that you are worth staying. Why do you stay abroad alone while Australia has such a complete family?

E: Do you have the language ability to go to Australia independently? You can't just have money. What should I do if I don't understand the language and get lost? If you can't express yourself in an accident, it is very dangerous.

If one or more of the above information is not good, it means that your immigration tendency will increase and your visa pass rate will decrease.