It's been well documented this season just how young this Giants defense is. They have the most amount of rookie snaps of any team in the NFL, and it's mainly because of their starters on defense.
First-round cornerback DeAndre Baker has been starting since Day One, and so has DT Dexter Lawrence. Mix in players like LB Ryan Connelly (out for the season with torn ACL), OLB Oshane Ximines, and now CB Corey Ballentine and you can see why this unit has struggled facing top offenses this year.
But this is what the Giants want: develop the young talent to set a foundation for next season and the foreseeable future. Rome wasn't built in a day, and GM Dave Gettleman and the rest of the front office realizes there is a process to this.