Philosophy is a lot broader than the main ideas Aristotle made. In fact, the main ideas have branched off into different studies. Science is a branch of metaphysics with its own philosophy. Its philosophy also has questions.
Also, although philosophy has main ideas, they don’t have answers to all questions of life. For example, metaphysics says that everything in the universe has a place of existence. However, Aristotle also talked about human beings having souls that move throughout the cosmos and reality. 
Not everyone believes that humans have a soul or believe that cosmos determine reality.
Aristotle’s idea of logic was also too broad. Ancient Greece wasn’t aware of all parts of the world. Therefore, they believed that the earth consisted of the eastern hemisphere. Although all Greeks would agree on that being true, they would still be wrong because they were ignorant of the other places of the world.
Philosophy only has a few ideas that would answer simple fundamental questions. These are all answers that everyone in the world can agree on. There are still more questions that people have that many can’t agree on. It takes more than philosophy to be able to solve all of life’s pressing questions.