More and more of our data is being stored online. Many things that you might want to keep confidential is nonetheless behind a poorly designed "firewall" of passwords. That's the problem. Demanding that someone never forget a manual process (locking the machine) is adding a massive point of failure. This is bad.
What does that have to do with a browser and poor analogies? Neither protect important documents on disk, a shell open with root, an ssh open to your production, etc. I'm not condoning Chrome's actions, but I'd also demand not storing passwords in a browser at all, and do all sensitive browsing in incognito, so your sessions can't be lifted.
