Ah, yes. The "Pac-Man reimagined as a modern AAA game" problem: https://youtu.be/tVY_oJlv_Eo
I don't think Runescape goes overboard with warnings. A lot of places have a "hey this place is dangerous, are you sure you want to go in?" dialog but they usually don't even explain exactly what the danger is, they don't stop you from going in unprepared if you click yes, and there were some changes to reduce how much stuff you lose if you die but dying in the game is still overall a huge PITA, especially in PVP where your killer gets to keep most of your stuff. The most impactful softening I can think of is that you can pay a large fine to the Grim Reaper to get your stuff back if you die to monsters and don't get back to claim your gravestone in time.