If he continued to argue with the other and insist on what he thought was the right thing to do, he would only seem like a stubborn guy who simply didn't want Wulfric's help. All the things he said would only sound like excuses.
"You really are quite tenacious."
Wulfric shrugged. "It's my only virtue, so I might as well use it properly."
"I don't think that's your only good point."
Wulfric's ears perked up and then asked like a puppy waiting to be praised, "What else do you like about me?"