Exactly my feeling... as far as themes and website building are concerned, Gutenberg is taking the power away from developers and giving the power back to designers. A welcome change. After all, that is why page builders, in the first place, were invented. Gutenberg will do it better.

For instance, the latest StudioPress themes now benefit from advanced Gutenberg support, and it is a radical change : layout constraints are gone, having to deal with PHP to tweak templates is now a thing of the past, included high quality css styling for blocks has become the main asset.

Style will alway be a matter of taste, for sure, that is what freedom is all about. Essentially, we are all designers.

As a side note, I have always disliked Facebook for taking away the freedom to style my pages according to my personality. It always gave me the feeling of being on an intranet of sorts. I believe an innovation like Gutenberg has the power to bring more people back to the open web.