There's no purpose, it's reality, the only way to get him out is for fans to make it impossible for him to stay basically, where he decides it's just too much hassle to stay on, the board aren't going to get rid of him, he's not going to fall low enough in the table for them to do that, they back him 100%.
If he feels he's universally not wanted, he might decide it's time to call it a day...but you never know with Wenger, he might take the opposite stance just to prove people wrong. We're in a very unique scenario here where someone has had power for 20 years and controls many facets of the club, way more than he should and where the board are universal and unwavering in their support for him.