You’re forgetting one big factor. Your sites need to be responsive this day in age, Blocs may feel restricted and not free form, but that’s because it automatically handles a lot of the work so your site is responsive, meaning it looks great on any device.
Free form web design apps don’t really make this clear, but you could end up doing 10x the work to get your site looking right across all devices possibly more.
Blocs is more than a name, its a description of the paradigm for the app. Just like Lego, Blocs is not high fidelity.
I am working on a more simplistic way to move objects which is a little more free form but not on the level of a graphic editor. That will ship in the not so distant future.
Blocs is a compromise of creating decent responsive code and ease of use. Don’t be sucked in by ease of use wysiwyg unless the tool delivers on site code quality and responsive features.
How a site works for its visitors is far more important than how easy it is to create, especially if big compromises like the responsiveness of the site are made.