Why did France give up when Paris was taken in WW2? They could have kept fighting just like the Polish did.
Without a major fight! Where do you get your facts?
Loss of over 1.5 million prisoners in less than 6 weeks, loss of virtually 100% of fighters and modern tanks, plus 100% of the artillery, firearms and ammunition stored in the Maginot Line left France completely defenceless. Sixty one of 117 total divisions had surrendered, the BEF had evacuated twice, leaving French units vastly outnumbered and out-gunned by the Germans.
France surrendered on June 16, 37 days after the invasion on May 10; the last Polish regular army units surrendered on October 2, 32 days after invasion on September 1. I don't see that there is a major difference here.