Try to please everyone and you'll please no one. Rachel Lindteigen delivers some solid advice here to focus on your niche rather than trying to create generalist content. There are several reasons why this is a good idea:
- You can focus on your real area of expertise rather than faking it. This will help build trust in what you have to say.
- It's easier and faster to do, since you already know the topic: there'll be less research involved.
- You can actually say things of substance rather than be one of thousands of blogs all repeating the same vague generalities.