Not necessarily. For example, you can't eat the following two kinds of wild vegetables.

Qucai Lady: The leaves are long and narrow, thick and hard, and the edges are serrated. After autumn, the leaves grow close to the ground, and the stems are 0.5 ~ 1 ft in height. Eating it will make your face swollen.

Poisonous celery: also known as wild celery, Chinese Pulsatilla and poisonous ginseng. Growing in wet places. Leaves are like celery leaves, which bloom in summer and the whole tree stinks. The whole tree is poisonous, and the flowers are the most poisonous. After eating, it will cause nausea, vomiting, cold hands and feet, quadriplegia and even death.