Why do most games only use the first memory card slot on the PS2?

Memory card problem when using PS2 ps2 memory card slot 1 not working In the slot 2 the ps2 memory card works perfectly Theres another ps1 memory card that simply doesnt work in any slot (it worls, i tried it in ps2 slot FreePSXBoot with this is also easy to configure plus you no longer have to sacrifice a memory card for it Why no 5-Starts:

slot formation The 8 MB Memory Card allieviates that problem by organizing and storing files much more like a computer hard disk