What about wool, honey, milk, eggs.

Again, it's a matter of whether you're looking at things in the abstract, or in terms of how things actually work.

Take eggs for example. Eggs aren't just a byproduct of having chickens around, there are specific breeds that are dedicated to egg-laying. Because only a small number of males are needed for reproduction, most male chicks are put on a conveyor and ground to death. While I can't claim to be an expert in German laws, I did find that German courts have allowed this practice.

It's a similar story with milk. Because dairy cows are a different breed, male calves are typically slaughtered at birth. Dairy cows are kept in a constant state of pregnancy, suffer the stress of being separated from their young, and are killed as soon as the milk slows down, typically a quarter of their natural lifespans. Dairy is also similarly bad for the environment as beef, and there are widely available plant-based substitutes like oat milk that taste just as good, if not better.

No matter what animal product we're talking about, maximization of profits is almost always going to involve cruelty, environmental harm, and selective breeding to the point that any expectations about natural by-products aren't true. Even with regulations (which can be difficult to enact effectively), there are tradeoffs: limiting cruelty can increase environmental impact (as well as the price). If animal products were appropriately priced based on offsetting the harm they cause, they would be unable to compete against plant-based alternatives.