In reply to Anh Tran.

It's true that the folks pumping out page builders have done a lot to push this concept forward. We gotta remember though that they have a teeny tiny little user profile to worry about. The folks working on this problem for WordPress at large have a much more daunting task.

You can see that come into play in how most page builders choose to address the objective.

If your tool is presenting with you margin and padding inputs in the content creation UI - you've already lost. That's a visual code editor (which serves the user profile that they're solving for).

For anyone that built websites in the 90s, going back to a dreamweaver-lite content creation experience is not something I'm too excited to do.