As my friend Tom writes, someone has written your blog post. But I don't write because I'm sharing entirely new things, I mostly write and do videos to help cement my knowledge. Much as Tom suggests.
Writing for others is important, but it may be just as important if not more important than writing for yourself. Distilling your ideas into something that you can explain is incredibly helpful in making sure you solidify the information you’ve learned.
Almost every time I sit down to write about something I think I understand I end up doing more research so that I really do understand the topic.
While I may want to make a living full-time off my content, that's a long way off if it ever happens and yet I'll continue to write because it helps me learn and be good at my job.