Earlier quoted context omitted.
PDF is an executable file. Many people are worried about running Javascript but still use PDF files without problems.
For better or worse, the years I spent working on Preview for Apple (and PDFKit) I felt bad that our (Apple's) PDF implementation was far short of Adobe's. Radars would show up with PDFs attached, "Preview Does Not Display 3D Image in PDF Like Acrobat" or similar. And I would feel so ... inadequate. PDFKit could render and capture basic annotations ... and that was about it. We could show you forms, allow editing, bu…
Adobe has an awful track record of security (how many exploits in the past 25 years were in Acrobat (not the PDF spec, the actual Acrobat software) and in Flash?) but PDF is an amazing gift to the world, and, thanks to people like you, effectively safer than how Adobe designed it :))
Unfortunately I have the full Acrobat on my work computer, mandated by my employer, sigh, but that's another story.