Be serious. If I use a page builder, such as Enfold or Visual Composer, I can get a client site completed in much less time, with a consistent design, and with more precision than with Gutenberg. You're saying that I should use Gutenberg because simply because it is the WordPress Spec. But, as it stands, Gutenberg is simply inferior to page builders. IMHO that goes against the ethos of WordPress, which was always for extensibility i.e I can take my choice of competing plugins, themes and page builders according to the needs of my client and the project. Now, it looks increasingly like we're stuck with a system that is slower to use, delivers imprecise results, requires the download of overlapping blocks, is barely out of beta, AND that will destroy competition in the space. Even if it conforms to the "WordPress specs" that's not a good result.