Blog in the health space...should I keep going?

I have a new blog that focuses on health, but more specifically longevity and health optimization. The health space is obviously saturated with big players such as healthline, livestrong, as well as big media companies. While I would love to write about the subjects I'm most passionate about, the top positions are typically posessed by the aforementioned companies in addition to scientific journals. When I focus my efforts towards SEO, there are certainly keyword opportunities that aren't saturated by the big players, but that I have little to no interest in writing about many of them. For anyone who has had a similar experience (Whether or not in the same niche), how did you manage it and is it worth it to keep going down this path or switch to a different niche?