That is indeed an strange issue.
The icc-profiles-free package in #Trisquel and other free/libre system distributions also provide already free/libre profiles, and with argyll package's colprof command you can make the .TI3 files be useful even in #Inkscape. But all comes down to which color profile the *target printing device* uses. There was a conference in #Brazil / #Brasil about these issues. Print houses which don't provide the color profiles files, aren't good.