I would say that most small B2B software companies aren't giving profits to investors, they're giving revenue to operations overhead to support staff that aren'

I would say that most small B2B software companies aren't giving profits to investors, they're giving revenue to operations overhead to support staff that aren't strictly needed, but are nice to have (sales, marketing, HR, larger than necessary dev teams, etc.). Any company focusing on solving a single problem while growing slowly is generally a lifestyle company rather than a true startup in the HN sense, and can be as efficient and profitable as yours.