Some land plants have evolved specialized vascular tissues that have allowed them to thrive on land. the developement of these structures was necessary because

land plants need to extract water from the ground and move it to the other structures of the plant.
land plants need to be tall and the vascular tissues are what provide rigidity to the plant’s cells.
land plants need to photosynthesize and the vascular tissues is where this process occurs.
land plants don’t really need these structures as they can absorb water from the air through their leaves.