I don't think your analogy is apt. Having your development environment set up and knowing how to use your tools reasonably efficiently seems like it should be a low bar to pass. We're not talking about giving someone unfamiliar tools or an unfamiliar vehicle and expecting them to perform higher level tasks. We're just watching people use their existing tools to see if they're actually familiar and comfortable with them.
OP's post was "having custom themes" "bias against people using windows".
These aren't tests if a user can si their job or knows their tools. This is a cultural purity test to see if they have the same quirks as OP. And is a terrible way to judge if someone will perform.
