Two years back I started a podcast[0]. By all "viral" metrics pov, it is a failure - didn't get thousands of downloads, no first page hits etc. But I became a better conversationalist.
Now whenever I interview people in my professional life (I'm a CTO and have to interview people for top level positions), they routinely tell me, they had their best interview. For long, I couldn't trace it back to the podcast. After many people compliment me, I asked one what made it a better interview. He said, you let me explain my project and you listened. That is when it clicked. Those are the skills I learned as a podcast host.
I paused the podcast last year, because I got covid and for other personal reasons. With this feedback, I'm going to restart the podcast.
Not all creative projects have to make money directly. There could be 2nd order benefits, which we may not see immediately.