All of today's desktop browsers come with developer tools built in. How many people know that, and how many know how to use them?

Many Android phones come with unlockable bootloaders. Again, how many of those who bought such a phone know about this capability?

What I'm trying to say that it's fine to sell a device in a locked down state. What's not fine, however, is not providing an unlocking mechanism, possibly deliberately well-hidden like it is in case of Android bootloaders, for those who know what they're doing.