It's quite relevant, as 5/5 meaning 50% or 100% are two very different things. If this is a locale-specific issue of Australia vs. America (Canada), I'd suggest doing something clearer like 5W2L or something else like different colours, additional columns (with columns), or at bare minimum adding a legend. As designed and shown in the screenshot, this will be totally counter-intuitive for new players who are used to this meaning something totally different. So reducing confusion (and forum questions, and support tickets) is almost always a better idea (the POLA rule).
As for the airport conversations, totally agree (since I don't want to mute this thread in case real/relevant posts are made).