Amazon’s decision on Valentine’s Day to break up with New York — chosen as one of two sites for its second headquarters — is a story of missteps on both sides set within a politicized environment that resulted in lost opportunities for all, according to experts from Wharton and elsewhere. If cooler heads had prevailed to work through the issues, New York would have gotten a big boost to its standing as a main tech hub on the East Coast while Amazon would have gained an exceptional talent pool and tax breaks. “It is a missed opportunity, but on the other hand, life will go on for both Amazon and Long Island City” in Queens, said Wharton real estate and finance professor Susan Wachter, who is co-director of the Penn Institute for Urban Research .…