I would argue that non-commercial source-available licenses, such as FUTO licenses, are actually *worse* than typical proprietary software; all FUTO-license software is proprietary software, but the source code is available.
Windows/MacOS is more clearly against your freedom to study, share and modify, due to lack of source code, so you know to reject it.
New people who are uneducated about rights given by free, libre and open source software, will see FUTO and wrongly think they have freedom.