Funny you should mention this python alternative. For a potential use case, I was just using this style of iterative initialisation and shutdown within a single thread to do sros2 access control verification this week. Interesting to know that had I used rclcpp to benchmark my policies rather than rclpy I would have hit this current issue. I also found using the try_shutdown method more forgiving to use should you ever lose track of the state of things like when developing from in an interactive python shell session.
https://github.com/ruffsl/PPAC_ROS2/blob/master/simple_init_test.py
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