This seems to be the constant struggle balancing competition and training.
The scenarios you list are common topics among those involved in IDPA. I encourage you to read a summary of the initial suggestions collected by the "Tiger Teams" listed here:
http://idpaforum.yuku.com/topic/8070/Summary-of-all-suggested-changes-to-the-rule-book
IDPA is never going to be a complete simulation of concealed carry/home defense scenarios. I encourage you to enjoy it for what it is, shoot what you want/or carry, and get what YOU want out of it. Whether that is to win a game, assess your shooting skills, confirm you can shoot under stress, etc.