Yea yea I get it, doesn't make any sense. But currently, things are so scarce you have to hoard pretty much everything. Then when you get to the colony stage, you're gonna use them to dump all your weapons, rare items and ships you don't use at the moment. Since hazard rating makes such a huge difference you're almost guaranteed to have colonies extremely far away from one another. This all combined means you'll run around like a headless chicken in hyperspace trying to find where you stored that Tachyon lance (since we don't have a way to see all items in storage yet).
I saw someone suggest having things delivered to your current location but that still takes time (the most important resource), leaving you defenseless against expeditions if your ships are stored on the other side of the sector. Honestly, we already invest so much into colonies, and storage comes free with it so I don't see a huge problem with it except making things easier than they already are for some people.