I mean we can also make long lasting clothes out of natural fibers without hurting animals.

You can indeed. But growing cotton has already resulted in environmental changes beyond my comprehension.

I guess the first step should be to adapt a habit of clothes repair

Growing cattle has also had a massive impact on the environment. And you often need more land for animal based materials because you both need land for the animals and the land to grow food for the animals. With cotton at least you just need land for the cotton.

Why is this always brought up, stop spreading this. Animals usually are not fed grain unless it’s harvesting time. We also do not grow food just to feed them. The grain we feed animals is shit you cannot eat. It’s roots/stalks/stems/bad/rotted plant matter. It’s the leftovers from the greens we can consume. Most animals also are raised on land that is not suitable for crops, rocky/hilly/weak topsoil land.

Animals products are less efficient for a simple energy reason. Animals produce heat which radiates away as lost energy, and they rely on consuming autotrophs. All life gets its energy from the sun, we as animals get it one or two down the food chain from plants or other animals (which are also eating plants). Animal-based products are simply less efficient.

You can think this all you want, but you cannot consume what they do, you also cannot grow crops usually where livestock are raised. Crops need a pretty flat chunk of land, livestock don’t.

Except for the deforestation needed to increase pasture area and for growing more feed. Destroying habitats and pushing indigenous people further from their homes. Meat on a large scale doesn’t work because it is energetically less efficient. Farmed animals produce waste products like methane which are large contributors to global warming. Even if the land used by livestock was completely unusable for other purposes, they would still be polluting the environment through eutrophication and destroying locally endangered species.

Everything you just said…is the same shit that happens for plants as well. Deforestation isn’t something that happens only with livestock. It also only really exists now in poor countries for people who are trying to survive by any means. You also are assuming that plants don’t use nutrients from the soil or that the ground has to be fertilized or sprayed with pesticides or that large machinery has to be used to harvest it.