You're right to some extent, but those sanctions are much more biting than you think they are. Iran can no longer do business through Dubai because their bank credit has been frozen and Chinese and European companies are now refusing to deal with Iranian clients, citing the ban. Thus, they have difficulty importing basic products and spare parts that they always were able buy with ease.
EU's Tusk warns Turkey to cut refugee flow (Reuters)
from the article: Neighbors / Iran above Islam