The magazine says this is because so many Spaniards live in lots of apartment buildings. But their graph shows that Spain has 19.8 elevators per 1000 people, while Hong Kong (!!) has only 10. Wait, what? This smells like someone is forgetting a variable. In this case, it's probably the density of elevators per occupant. I'm guessing that Spain has lots buildings just barely too tall to be walk-ups. That's a much less…
They were also easier and faster to complete by not exactly stellar construction companies, so they could be dumped into the market (and during Franco's rule, basically as high as you could go with their defective concrete), and I think a lot of my country fellows associate them with the summer town architecture and higher quality of life, while taller apartment buildings were left for lame sunday tourist Benidorm holidays.
There's really really very few people accustomed to living in tall buildings. Taller buildings were built during the construction boom, but a lot of them are vacant.