Yeah, gas sites in w-hole systems may be very profitable but are also much more dangerous, not only due to rats spawning, but also due to their location. No local chat available so players don’t know if others are in there and there’s also the possibility of the w-hole exit closing on the player. Not to mention that content requires players to first scan for w-hole systems and then scan again for gas sites after entering.
That’s something I think is more suited for players with a bit more experience.
W-hole gas sites give materials used for Tech 3 production whereas gas sites in known space give materials used for Booster production. If a new player was also interested in doing some Industry with gas materials, I think producing Boosters has easier / lower skill requirements than Tech 3 production.