Is it really the must to develop a solid understanding of the markets?

Let’s start from the first one “Develop a solid understanding of the markets”. Is it really the must?

Developing a deep understanding of the markets is not always necessary for successful trading. Some traders may be successful using a long-term, buy-and-hold strategy, or by using automated methods such as algorithms or following the trades of successful investors. The key is to find a strategy that works for you and that you are comfortable with.