Surely if planning into discretion was allowed, they(company) wouldnt need to apply annex/variations to certain flights. Staff the airline adequately and these issues would go away. We as pilots are payed to operate the aircraft safely and efficiently not cover for other departments bad planning, lack of planning or any other such deficiencies. Stop covering for them and hold them accountable for their inadequacies, like they try to do so often with ours, through punitive measures.