Comment 4 for bug 1887296

We do not consider Gnome's defaults in this area unreasonable. In the years the feature has existed there have been practically no complaints about it. So that's why this bug is marked 'Won't Fix'. We could also use the status value of 'Opinion'.

Indeed you don't need to install an additional package, you can just run:

  gsettings set org.gnome.mutter attach-modal-dialogs false

I agree such a setting should be easier to access. That would be an enhancement for Settings (gnome-control-center).