Why hadn’t europeans used maritime routes before the age of exploration?

For periods, Europeans transported these goods on a land way from Asia over thousands of unsafe kilometers. In the 15th century the overland ways are being organized by the Turkish Territory, which made it even harder for European traders to pass done. Consequently, some European nations decided to look for another sea path to India. With the assistance of fresh types of ships that could navigate quicker and instruments like the quadrant, they underway the age of exploration.