According to Adobe Acrobat Customer Support*, when I customer presents to the support team with corrupt or unreadable PDFs created by the Adobe Print Spooler, they always recommend deselecting the 'Rely on system fonts only; do not use document fonts' feature option.

If they 'always' recommend that this option is deselected, then this option should be deselected by default.

Suggestion: change the Adobe Print Spooler > Rely on system fonts only feature option default from checked to unchecked.

*For example, case number: ADB-33043877-Y8V9