First of all I think that violence in self defense or survival is justified, plants have tropisms which means they have small hard coded responses to certain stimuli like leaning toward light, they do not have any form of sense processing thus no awareness no preference theyre an object

Even if you wanted to minimise the harm caused to plants, it takes far more plants to feed livestock to sustain an omnivorous diet

Debunking a myth: plant consciousness. Protoplasma 258, 459–476 https://doi.org/10.1007/s00709-020-01579-w