Every time I talk to someone about scuba diving, they give me the same reply: “I don’t like being submerged in water”.
Water covers roughly 70% of the Earth. I’d consider scuba diving a form of travel. We are traveling to parts of Earth that can’t be reached by train or plane or walking. To visit the “cities” and meet all its “citizens” in these parts of the world, you have to wear some special gear, your Self-Contained Underwater Breathing Apparatus. Getting Open-Water Certified is like getting a passport to travel to cities beneath the waves.
When you fear what you don’t understand, seek to understand and your fear will disappear.