[Elvewyn]

It seems a bit odd to me to ask whether the user has ever used a Linux system before, then ask which package manager they'd prefer (without an "I don't care" option).

I chose pacman, as I'm already using Arch, yet the best match for me was Debian with 87%.

[wodow]

You can signal "I don't care" by pressing the Next Question button without selecting an answer. Not obvious though.

[basvdwollenberg]

It does say "You can leave questions unanswered" at the start, which can be seen as saying it's an "I don't care" option.