If someone i know is getting 2 molars extracted at age 14, would the wisdom teeth help fill in the gaps from the missing teeth?

Depends: If it's upper 2nd molars being removed, 3rd molars (wisdom teeth) may be a viable option. In the lower arch, however, chances of successful replacement is more problematic. Your friend may need the help of a specialist Orthodontist to help create a successful conclusion. See an Orthodontist for an Initial Examination (usually free) to understand options.

Possibly: So hard to tell without an examination or knowing which molars are being extracted.