I build my own wheels too. There's another reason for these kinds of comments, which is that a lot of cyclists have been persuaded that wheelbuilding (and other kinds of bike work) is a deep philosophical mystery requiring decades of experience and a shop full of specialized tooling. Yet people have maintained their own bikes satisfactorily with basic tools for more than a century.

This happens in any technical discipline -- two people will disagree diametrically on the amount of gear and technique needed, yet achieve identical results. And nobody knows why.

So my own reaction is that equipment like this could benefit someone who is supporting competitive cyclists (including themselves), such a person knows who they are, and has already built a few wheels. But "the rest of us" sometimes just need a reassurance that much more modest tooling will get you to a satisfactory wheel that will last a long time. Likewise for routine periodic maintenance such as tensioning and truing. My goal is decent truth, zero spoke breakage, minimal re-truing later on.