yeah. People have gotten so used to following ! around, when presented with a game that doesn't follow that, they latch on to the closest thing to it, and can't let go. Same thing has come up over and over since day 1.
The Dynamic events are the "core" questing system. And those start in a whole number of ways. some are timed, some are spawned by simple getting close. some are chained. some are started when a player talks to a specific npc(not marked) of course, they will often run up to you and call up for help as well.
Hearts are there for flavor, to guide you around the maps/waypoints. even then, the hearts come in all shapes and sizes, theres a guy on reddit leveling a "pacifistic" alt. Leveling to 80 without killing a single npc.
Game is just full of explorers things. Hidden stuff with no heart attached or near. and often not even an orange DE.
Like just doing a daily the other day and exploring Diessa Plateau. Southwest corner of the map, there is an Ascalon ruin. go inside and you can find a coffin. you can use it, but nothing will happen. but in a room over there is a Statue to Dywana. Use that, and it gives a little speech about the people that worshiped there. It gives a moderately subtle hint to kneel. /kneel in front of it. and a ghost appears, telling you the name of the Confessor buried in the tomb. go back to the coffin, use it again, and this time you can say his name to summon him. (sadly, it doesn't make you type it yourself.) He appears, you kill him, and a chest spawns in the room.
Game is full of this stuff. Admittedly, mostly the starter zones. as most of it proved too hidden.. and presumably they realized there was no point in making stuff so hidden if no one found it.
Newer hidden stuff like lost coins,llamas, etc in Silverwastes have sparkles attached, and achievements.