Same reason a kid in the States can go undrafted out of high school, to #1 overall 3 years later.
Not saying any of the kids are now premium prospects, but I wouldn't completely write them off either. A lot of development can take place physically over a couple years. I get the sentiment ... the younger the better in terms of 'foreigners' but you never know.
Where is that kid going to where he improves from nobody to star? Strasburg could do it because he was developing in college.
