So where are they making these bricks? In space? Why do you need bricks... In space?
It would take effort and time, but surely there are far more efficient ways to make bricks on like Mars considering the vast amount of water that's been discovered.
Firstly, this is for creating concrete on mars, where resources are very scarce and making regular concrete is not viable. Secondly, to survive martian conditions, we need to build bases, a lot of very sturdy, structurally sound bases. And lastly, before the potato based concrete, blood was genuinely the most viable solution, being an easily renewable resource. IIRC the martian concrete is now magnitudes better than regular concrete.
You'd think that, but believe it or not: blood or potatoes.
...
So the three little astronauts go into the Martian house of blood, and the big bad says "L̶̛̲̗͕̞̍e̸̢̛̼̦͔͋̚͝͝t̸̩͎̺̙̗̙̃ ̶̝̖̣̃̌̚ḿ̵̡̻͆͘ę̸̛́̀̌ ̶̡̙̩͆͂ͅi̷̢͙̓̈́͛͂ń̴̬̩͔̳̱"