I think prioritizing their careers will potentially be better for both of them, as it ensures a better financial future for them, if they still do end up together. While Yorkie came off as a bit too judgemental of the mains' relationship, he has a good point. If they did not pass the trial of time and distance, then their love for each other may not be that deep anyway, considering they're still immature. Then again, 5 cm/s may apply to any relationships, even to those with a genuinely strong bond.