Update: I did not bother adjusting the Inno script because I thought I should just try installing the vc_redist.x86.exe manually as administrator first to see if that did it and also manually repairing it but neither worked so if that doesn’t replace a missing dll then the Inno setup file would not either.
It does seem like the system thinks it is installed and so does not try to replace it which is weird so I do not think there is any other solution for a full proof way of ensuring all those dlls are on the system other than including them in your app’s libs folder.