Fair is Fair, I disagree about Subban, but that's cool everyone has an opinion. But.. In virtue of the position, I would say goaltending is pretty important! But eh, we're all on the same team.
It's about how important stuff is on the margin. In the modern NHL Good defensemen are more difficult to acquire than good goaltending so I think it's more important than goaltending. The difference you get between Price and a goaltender you can acquire for say a 2nd and 3rd round pick is a lot less than the difference between Subban and a defenseman you can get for a 2nd and 3rd round pick.
To put it simply if I were Bergeron I'd entertain a wide variety of trade offers for Price. Trading Subban would take something absurd.
Price is the face of the franchise because he's our best player. However, Subban is a marketing expert's dream and he is probably the biggest fan favourite right now. Another big season and Patches will enter this discussion as well.