Of course the level of technical skill you need depends on what you're trying to achieve. But if you want an audience then you'd better be good enough to satisfy them. (Tichy wasn't looking for an audience so he's a special case.)

For example, are your technical skills (exposure, development, printing, etc.) good enough to enable you to consistently make satisfying prints? And do they satisfy both you and your potential audience? If not, then you probably need to gain more technical skills. Or are there specific situations in which you'd like to be able to make something but currently can't? If there are, then it's probably worth learning some more technical skills.

But if the making is its own reward, or if both you and your audience are satisfied with what you make, then searching for more technical skills is at best an academic exercise and at worst a distraction.