[Beldin]

> every talk is a job talk

Absolutely. A subset of the people in the audience are tenured or tenure-track academics. These folks get grants for postdocs. Moreover, they may be on a hiring committee. Even better: if you leave a favorable impression and a colleague of theirs has a job opening, they might recommend you.

Treat (academic) presentations as job talks. Good impressions open doors, not just in the immediate future but also further out than that.