I don't think it's a problem as many people think. Followers don't tend to follow you to buy products from you. They follow mostly because they like to watch a story as it happens, get some inspiration for themselves, and occasionally learn something actionable. Talking on various topics doesn't necessarily detract from being interesting in that regard (within some limit).

When it comes to monetization, only a small fraction will buy directly. Your audience helps you most by spreading the word. Since they feel they know you a little bit, they start recommending you and your work to their friends and followers. It's this network effect that makes it really powerful.