Ease of use enables the user to perform actions with more impact. Think of it as Python vs C. You need a lot more knowledge to get started with C, but you can customize almost every aspect of your program. With Python, you lose some customizability, but you can do a lot more in a lot less time and understanding. If you need the customization and you have the knowledge, you can also build C extensions for Python (which would correspond to the chrome flags).
I'm not saying I'm for this change or not. Testing it out on real users will decide its fate, I'm quite ambivalent about it. I'm just speaking for ease of use in general.
Practically all developers started as users who got curious about something and wanted to learn. In some ways, the less information a UI exposes to them, the less inclined they will be to ask - because they don't have anything they can particularly ask about. I'm extremely opposed to hiding the default hiding of the URL scheme for this reason: users are far less likely to ask "what's HTTP?" Certainly many won't care, and to them it's "just another part of the website's name", but future developers are (or should be) the ones who do, so it potentially reduces the number of genuinely curious and inquisitive developers. At the same time it conditions them to think that such opaqueness is the norm, the way things should be when they write their own applications, and the vicious cycle repeats.