As a matter of fact, it can be a good thing. Well, what are caves really like. As you probably know, caves are underground and no sunlight can reach very far into them, so they are dark inside. To see in a cave you have to bring your own lights in or go to a cave where people go on guide tours like Bridal Cave. Caves are dark but that does not make them bad just different from what you are used too.
Caves are dark, just like lakes are wet and mountains are high.
Imagine what it would be like if you lived all your life in a cave and that is what seems normal to you. If you saw sunlight you might actually be scared of it because you would not know what it was. Caves are usually wet because water seeps through the cave roof and falls on the floor and walls. That does not make the cave scary either. Some people do not like caves because they think that caves are cold.