It seems certain that they use iPhones for everything. They can’t even subject themselves to using an iPad. They just copy things from iOS straight into iPadOS and macOS and let others (end users) deal with the fallout. Craig Federighi doesn’t seem to pay any attention to software anymore.
Consumers don't understand tech specs, so if you show them something that triggers their lizard brains because it genuinely looks really good, appealing, futuristic, trustworthy, etc, then they'll buy it for that.
The issue is that most designers are snake oil salesmen, so from the perspective of management and C-suite who approves designs, you can't objectively verify the claims and buzzwords of the design team. See the pepsi logo redesign fuckup.