This is survivorship bias: art owned and protected by wealthy sponsors has a much higher chance of making it through the years. Most art is folk art, and has been lost to the centuries.
The did say "longest lasting art". It feels more survivor bias to mention the Picasso's of history over the many more wealthy who spent their time in the craft.
It's not fair, but it makes sense. And sure the most well known art is not the best art. But a place like this should know the best tech is rarely the most popular product.