You can use the same argument for a vendor selling X200 laptops preinstalled
with coreboot and Windows. After all, you can easily replace coreboot with
libreboot and Windows with Trisquel. You don't need to disassembly the laptop
to do that, just run some commands or the installer.
However, the average user, possibly coming from Windows and looking for
privacy and freedom after Snowden's revelations, might not even know that
Debian doesn't fully respect your freedom, and not even find about Trisquel
except that it's "crap", right from the website of it's fully free BIOS
replacement, libreboot:
https://notabug.org/vimuser/libreboot/commit/fb8d22f6ef43dcc989480329b381e5a3223762b6
