Hi,
Long story short: Lots of figs have viable seeds pollinated or not .
check my topic on fig pollination myth kill.
So yes, you'll get "weeds" growing if you plant those seeds. BUT it will take a long time for you to see fruits - and they may not be edible or may not taste good.
So do it for fun. If you're looking to eat figs, using available strains is the best path to walk .