Zombs are very important thematically to the game. They represent the feeling of doing (environmental) science in a world where many people are actively antagonistic toward that endeavor. It is important to me to have this friction in the game. It is also important that you cannot really just attack zombs, you must learn to live with them.
Plus, they are a life form that you can manage and that can have an important impact on the ecosystem.
There are MANY things you can do to deal with the zombs. Check the tool, item, and task descriptions for hints. Or ask on the Vilmonic Discord: https://discord.gg/vilmonic
Just don't attack them!