That doesn't make a whole lot of sense to me, but I guess it might to a coach. To me, especially with the limited number of scholarships you have, you'd want to be sure that all 11.7 of your scholarships are being utilized in some fashion every year.
We are currently redshirting some players as well and have done so every year, but I still won't understand it, unless you're talking about a pitcher, catcher, or someone you believe won't be a top draft pick in the future.