Well it's my experience that managers almost never think about the product or the customer, and almost never feel the need to justify their focus to the engineers who are (at least sometimes) thinking about the product and the customer.

I've never once had a manager say anything along the lines of "I just think we're building a bad experience if we release this early." I have heard them say all sorts of politics like "If we get this out now, then that'll prove massive impact that will free us up politically down the line"

Or for example I worked at a known location-sharing startup, and managers gave 0% thought to concerns like "hey is battery life impact worth measuring?" and kept pushing random integrations (like with Italian telecom company) hoping to get some huge amount of customers (which never payed off in my experience).

When I picture managers and directors I think of the idiots at Yahoo managing to fail to understand I need more than 15megs of storage or a spam filter (can't imagine what those managers were wasting their time ona), while a company of mostly engineers with scarcely any management builds gmail and eats their whole market.