Since they were leased vehicles, it was actually cheaper to get the cars back and destroy them than to support them and build that infrastructure.
Out of curiosity, who paid for all of the charging stations in California? In 1990, GM made a serious commitment to manufacture and sell electric cars that they later backpedaled from. If the tax payees of California were responsible for the cost of getting the charging stations in place, then that reversal of commitment was a major blow to the public. It's not a wonder they were pissed off enough to make a documentary with an agenda.