that's a pointless endeavor. The seniors should just be building everything, not wasting time working on a harness that won't guarantee results anyway.
The seniors shouldn't be building the product; the product team can build the product directly. There is no reason for a product manager to ask a senior engineer to fix the spacing or update the tab sequence for some workflow. The harness should be sufficient for them to do at least that. Get it right and a product manager should be able to build whole features if enough of the heuristics and system level constraints are in place.
Not quite; the point of the engineers is to build the machinery to make this "safe". Establishing key architectural decisions, rails, and safeguards; things that a product team isn't going to be able to resolve on their own.
What it does speak to me is that only the most senior engineers still have a significant role.
