There is always a hide and seek game between Product Manager and QC Manager when a product is being built. Project Manager, Management and Customer on one hand stress on complete involvement of testing team during product building. On the other hand product manager keeps playing tricks to bypass testing by a separate team outside his control.
This could be due to a fear factor in him, or lack of confidence on his product. For the sake of not displaying his these weak points to other teams involved in Product Lifecycle, a Product Manager tries presenting his points in other fashion to convince management or other managers for not giving the product for testing or providing the least duration to testers. This satisfies him for the reason that least exhaustive testing by testers will lead to least number of bugs.
But by doing this he also is doing a inappropriate deed for his product and in turn for the organization. Usually Test team is taken as an opposing factor by the product manager. In a way while the development of the product; he gets emotionally attached to his product. Feeling of getting it scrutinized by an outsider (someone not from his team) makes him feel as if someone is intentionally going to find faults in him or his product. He also feels that the higher is the number of bugs,