Define "real 3B". Urias hit 23 dingers last year in 490 plate appearances, and is on pace to hit close to those marks again this year, despite his overall batting numbers not looking as good. He also just turned 25, and is, in theory, on the young end of his prime years. It isn't a matter of being "overly attached", but moreso recognizing value and potential in a player who is still very young and cost controlled. Simply because a player doesn't look like Scott Rolen or Mike Moustakas, it doesn't necessarily mean they aren't a "real 3B".
That said, Adames has the type of larger frame that tends to slow down reaction time as he gets older. He also has the arm for 3B.