Maybe Han doesn’t feel like finding Luke is as important as it seems to us and the Resistance. So to Han, taking a brief detour doesn’t feel like a big deal.

Haha, I never thought of that! It’s all Han’s fault!
That is easy to say, but it is still likely something else could have gone wrong before they made it to the Resistance. Someone else could have tracked the Falcon, or someone could have recognized them at Ponema Terminal, who knows?

And if you make it to where BB-8 chooses not to tell them, then it kinda becomes his fault that all of that happens instead of Han’s. Alternatively, you could make BB-8 not know, but you would think a Resistance astromech would know where the Resistance Base is.

Every option presents problems, but I think just having Han not want to face Leia raises the least amount of issues.

Also, it is kind of weird that Rey is just gonna drop them off at Ponema Terminal. Why not just take them all the way to the Base, then go back? If she is so concerned about getting BB-8 to the Resistance, why not make sure he gets there?