That's true, but realize that the Arista Premium bulk rolls are not significantly cheaper than buying the pre-rolled cartridges. It amounts to an 11% savings over buying the infinitely more convenient, reliable, and easier 135-36 rolls. And you get lots of free 35mm protective canisters in the deal. Remember there is a cost in using the re loadable cartridges and bulk loaders too. Not to mention time.
Buying bulk Kodak TMY is a 44% savings over buying it in cartridges. Now that is something worth your time over. Bulk LegacyPro 100 is a 33% savings.
My system is unrefined and possibly not worth following. But what I do is put pieces of masking tape on 18 35mm spools and set them on the counter. I lay the reloadable cartridges and caps nearby. I open the bulk film can and take out the black bag. I set the bulk film can aside. I reach in the bag, takeoff the rubber band or tape. Then I set it, still in the bag, on my lap while I sit on my chair. I pull the free end out of the bag and tape it (the proper way) to a 35mm spool. Then I insert the spool into a reloadable cartridges and put the cap on. Then I use a homemade crank that I made out of a piece of dowel rod to wind the film into the reloadable cartridge. It takes 30 full turns for 36 exposures, if I remember correctly. I figured this out by counting how many it took to wind on a commercial roll. Then I tear the film off with my fingernails and repeat for all the cartridges. The bulk spool spins inside the black bag. For the most part the film is protected from dust and stray light because it's either in the bulk bag, or in a cartridge.