Why are there so few people applying for the patent of clothing appearance?

Clothing industry generally has trademark protection, and appearance patent protection is less. I give the following reasons here:

1. The examination period for design patents is about six months. When it is authorized, it is out of date. What's the point of holding this patent?

2. There are many styles and varieties in the clothing industry, the patent application cost is high, and it is difficult to protect rights.

3, the appearance patent has no substantive examination, and its stability is poor.

4. Fashion design is also a typical inheritance industry. Most of them are based on the previous designs, plus their own new inspiration and creativity, which is likely to constitute innovative designs.