I don't see any issues with him taking the offer? sure it's shallow because it is for "her" own benefit and it seems like manipulation because of the context, him having saved her for the sake of that mutual "interest". But given the situation and world building the author has given it should be...
This was like alright at the start but now it's kind of shit tier with how pitiful of a showing the mc keeps presenting. It's not even for the sake of any big emotional development