Why go after all three modules at once though? Also I suspect there will be other ways and places to get mats for those mods in future.
It's not a case of going after all 3 modules at once though. And I've gotten sick of the "jam tomorrow" argument - "things will be different/better at <some unspecified future date>".
Have you looked at the Guardian materials requirements to unlock just one module? Now picture what you'd have to do to collect those requirements.
What do you suggest - do one round of Guardian guff and go away again, keeping what you have collected until the next time you decide to go collect more? Nobody sane plays like that; "I'll travel 300LY to the Guardian Place collect some mats and travel back home again for a bit" - nuh uh.
"Gameplay" revolving around materials collection has gotten WAY out of hand in Elite: The Other Job Simulator.