Sure, we're well equipped to handle symbols, but we're better equipped to handle pictures. How much training does a toddler require to recognize the word "duck" versus a picture of an actual duck? I argue that you'd be comparing a time span of seconds to a time span of years.
But again, with training the efficiency in processing a symbol versus a picture becomes negligible. What matters is whether or not it looks good. Right now everyone likes flat design.
The only technical advantage flat design has over a more traditional approach is that it releaves a huge amount of burden from the designer. An icon of a floppy disc is way easier to draw then a 3d picture of a floppy. I would argue that flat design has allowed people with zero skill in traditional art to become "designers"
But again, with training the efficiency in processing a symbol versus a picture becomes negligible. What matters is whether or not it looks good. Right now everyone likes flat design.
The only technical advantage flat design has over a more traditional approach is that it releaves a huge amount of burden from the designer. An icon of a floppy disc is way easier to draw then a 3d picture of a floppy. I would argue that flat design has allowed people with zero skill in traditional art to become "designers"