I think you still need software brain, because ultimately, this stuff still has limitations driven by software constraints, and having the AI try to explain it to them doesn't necessarily help.
I think we all have had experiences with people treating their computers as magic boxes and not understanding why certain requests simply are not possible to satisfy.
A growing number of non-technical managers are now using Claude Code to build small custom software. A larger share will use Cowork to automate routine business tasks. Claude Cowork will become easier to use and more automated over time, as it learns the user's preferences, just like a good executive assistant does.
Granted, it's possible that a majority of people will not acquire proper 'manager brain' either and we'll see how that pans out. Evolutionarily, managerial skills are much more aligned with what many hunter-gatherers might learn as they mature and become more of an advisor than a doer.
Even if only 10-20% of people end up using multiple autonomous agents regularly for their work and business, that will change the economy. Contrast this with <1% of people who develop software professionally.