I would say yes unless they aren't defenders. Of course, there is always but... You need to check effectivenes of your offensive players, then put them as FK and corner takers. My team Celtic has 5* ST FK specialist whose rating is near scout, but his statistics aren't as we would expect. However, last season I had 4* MR FK specialist who was teams top scorer and top assistant, ranked 2nd top scorer of league and 3rd assistant of league. So that 4 * MR was more effective as FK taker than now 5* ST.