An alternative interpretation is that the See of Valencia is pretty important, and Cardinal Antonio Canizares Llovera is getting a promotion. Also, since he is 68, it puts him closer to home before mandatory retirement at age 75.
The article does not say why but only infers a reason leaving the reader to come up with their own conclusion. That is not good journalism.
Bad journalism. Pope Francis, I agree, is doing away with careerism, in that Cardinals who go to Rome think that they have a bureaucratic job for the rest of their lives. A Bishop is first and foremost suppose to be a Shepherd and a Shepherd oversees a flock, the Diocese Cardinal Canizares is being appointed to is a major one and an important one. Certainly, there are other younger bishops who could be brought to Rome to work in the various congregations as a “service” to the Church, not a career move to make oneself papabile.