Why weeds and wild plants are not affected by insects and pests?

Weeds and wild plants often possess natural defenses such as tough, bitter, or toxic compounds that deter insects and pests. Additionally, many have evolved to thrive in their environments, developing resilience through rapid growth and reproduction, which allows them to survive despite pest pressures. Furthermore, their genetic diversity often means that some individuals can withstand pest attacks better than cultivated plants, which are typically bred for specific traits and may lack such defenses. Finally, the presence of beneficial insects and other ecosystem dynamics can also help control pest populations, allowing wild plants to flourish.