You can take this mission even when you're slower than an EI500, making it difficult or impossible to complete.

See also:

shaggymoose 21 Dec 2021:

The same probably applies to the fetch medicine or carbon dioxide scrubber missions, but I haven't checked.

ferdinand 26 days ago:

Recently on my 1.9 run failed the carbon scrubber mission. Was sent out in my Manticore to an Anarchist settlement, rushed there at full burn, ignored all the defending craft blowing up the station on my way in, docking, grabbing everything, undocking and instantly flying back at full burn, ignoring all the defending craft.
Halfway on the way back "Mission failed"

I would say "Mission Impossible"