Yes COAS more active in the army, than the president because COAS comes from the army.
And president is more active in all other matters of country and not just army(there are two other branches of armed forces you know)..right from swearing in the govt to handing out presidential pardons(for example your president keeps on pardoning his cronies eg Rehman Malik and keeps hiding behind his position, so not to face your courts )...atleat COAS can not do that.
So which post is more honorable..requiring a person with untainted reputation?
And it not like COAS you have appointed in your country are innocent..they have gone to do many despicable deeds, a glimpse of which was given to you in my previous post.