I know nothing about the industry let alone in the era, but I imagine 'drawing glassware for Pyrex catalogue' wasn't a full-time job - but either a temporary contract, or just one project for an agency. So you might view it as an opportunity to perfect your drawing of glass, or just a boring gig but paying the bills.

If you reflect on your own profession & career though... Well, rather than speak for you, I too 'had imagined [myself] working in a more [x] capacity'!