Wilder's last 4 opponents (excluding Gavern since they both fought him and you're saying Joshua is fighting better jobbers): Duhaupas (32-2 at time of fight & currently ranked 38th in the world), Molina (23-2 at time of fight & currently ranked 44th in the world), Stiverne (24-1-1 at time of fight & currently ranked 6th in the world), and Scott (36-1-1 at time of fight & currently ranked 23rd in the world).
vs
Joshua's last 4 opponents (excluding Gavern since they both fought him and you're saying Joshua is fighting better jobbers): Whyte (16-0 at time of fight & currently ranked 43rd in the world), Cornish (20-0 at time of fight & currently ranked 68th in the world), Johnson (29-6-1 at time of fight & currently ranked 65th in the world), and Love (36-10-1 at time of fight & currently ranked 83rd in the world).
Looking at just numbers, Wilder's last 4 opponents have an average record of 29-2 while currently being ranked 28th in the world on average....Joshua's last 4 opponents have an average record of 25-4 while currently being ranked 65th in the world on average.
So, how's Joshua fighting a better caliber of jobbers?
Now...this doesn't mean that Wilder beats him or vice versa, but there's no way anyone can spin Joshua's opponents into being legit opponents while at the same time dismissing Wilder's opponents.. He's facing cans and destroying them...just like Wilder did
Quick research shows the best opponent Joshua is about to face in his last 4 fights (Whyte) is ranked only 1 spot above Eric Molina right now....who's the worst opponent Wilder has fought in his last 4 outings