I can't argue, I am not a knowledgeable person on this topic, I just told what I have learned and found in many books and site.Ummm i seriously think u're wrong abt that bcz. If it has a high oxidising ability it means that it oxidises well means its a good oxidising agent. So dont say that down the group are better reducing aggents bcz technically they r just poor oxidising agents. Link it with the electron give take concept of redox or it will bw confusing.
E.g there r bad conductors and good conductors and then there r insulators. U cant say that relatively poor conductors are insulators. Just keep to the basic concept bcz chem is confusing enough as it is right??
I hope u all get it now Rahma Abdelrahman