The assumption that companies like Macromedia and Adobe made in the mid-90s was that the kinds of tools artists would want to create with would be premade assets like images and videos. They assumed we would need control of ready-made shapes like circles, ellipses and fonts.
Golan Levin, Golan Levin on the Potentiality of Blobs
About the output, I remember I went through the Adobe PDF description, which was super long, and I wrote my own Adobe PDF files. I did an output from Director, which would write a PostScript file, so that I could then open it with Adobe as a PDF.
LIA, 1990s Net Art: Auriea Harvey, Joshua Davis, LIA, Draves