Если интересно, что Столлман на самом деле об этом думает (не все так просто):«The BIOS was impossible to replace because it was stored in ROM: the only way to to put in a different BIOS was by replacing part of the hardware. In effect, the BIOS was itself hardware--and therefore didn't really count as software. It was like the program that (we can suppose) exists in the computer that (we can suppose) runs your watch or your microwave oven: since you can't install software on it, it may as well be circuits, not a computer at all.
The ethical issues of free software arise because users obtain programs and install them in computers; they don't really apply to hidden embedded computers, or the BIOS burned in a ROM, or the microcode inside a processor chip, or the firmware that is wired into a processor in an I/O device. In aspects that relate to their design, those things are software; but as regards copying and modification, they may as well be hardware. The BIOS in ROM was, indeed, not a problem.
Since that time, the situation has changed. Today the BIOS is no longer burned in ROM; it is stored in nonvolatile writable memory that users can rewrite. Today the BIOS sits square on the edge of the line. It comes prewritten in our computers, and normally we never install another. So far, that is just barely enough to excuse treating it as hardware. But once in a while the manufacturer suggests installing another BIOS, which is available only as an executable. This, clearly, is installing a non-free program...»
https://www.fsf.org/news/freebios.html
Ну и многие сторонники свободного ПО используют какие-то проприетарные программы, здесь нет религиозного запрета. Неэтичным же считается распространение и навязывание несвободного (то есть ущемляющего права пользователей) ПО.
