CLEAN : Lambert Platini lost a battle but not the war

The speaker expresses gratitude and discusses his disappointment as both a president and a friend regarding Michel Platini's situation. Despite the setback, he remains hopeful. He explains his resignation due to a conflict between his ethical duties and personal loyalty to Platini.

What does the speaker mean by 'as long as the war is not lost, all hope is allowed'?

What choice did the speaker make between the duty of reserve and friendship?