To prepare a counter formation and order, perhaps ? We can't always be available to do it, during that narrow 15-min window...
To allow yourself some time to regain a bit of Condition, and not waste Rests ?
In most cases, during those 2-hours you'll have enough time to regain 5% condition, which is always better than having to spend 7 Rests to have the same effect.
By the way, I find 2 hours just slightly better than 20-min. IMO, there should be at least 6-hours between matches. Why isn't there 6-hours+ between matches ? Is there any valid reason ?