Attempting to schedule something in a way that minimizes conflicts doesn't necessarily imply that it's not the most important thing on the schedule.

> Given how long everything takes when dealing with immigration, it's not exactly surprising that they aren't able to accommodate people's schedules.

If things take a long time, it shouldn't make much difference to them whether they do an interview this week or next. It's surprising that everything takes a long time though, from a certain point of view anyway.