They can also easily employ combo lines that rely on already-good cards like Agatha of the Vile Cauldron and Underworld Breach
The prime goal in Pokmon TCG Pocket is to collect all of the cards available, but you can also battle using them, which can provide players with a host of rewards
You make a really good point about the standard dorks tending to be better cube fits than the modern and legacy ones
This was exacerbated at the end of 2024 when WotC announced that not only there would be 3 Magic Multiverse and 3 UB sets in 2025, but that UB sets would become Standard-legal for the first time
It might seem close enough between these three cards in terms of power that the mono coloured one would just win out but the clean ease of use of the gold options is pretty big
Once again, this isn't inherently necessary, although much like Wonder Stamina, the time between new packs is quite long