Confusion about the new param download_weights

In stable_diffusion.py,

```
if download_weights:
text_encoder_weights_fpath = keras.utils.get_file(
origin="https://huggingface.co/fchollet/stable-diffusion/resolve/main/text_encoder.h5",
file_hash="d7805118aeb156fc1d39e38a9a082b05501e2af8c8fbdc1753c9cb85212d6619",
)
diffusion_model_weights_fpath = keras.utils.get_file(
origin="https://huggingface.co/fchollet/stable-diffusion/resolve/main/diffusion_model.h5",
file_hash="a5b2eea58365b18b40caee689a2e5d00f4c31dbcb4e1d58a9cf1071f55bbbd3a",
)
decoder_weights_fpath = keras.utils.get_file(
origin="https://huggingface.co/fchollet/stable-diffusion/resolve/main/decoder.h5",
file_hash="6d3c5ba91d5cc2b134da881aaa157b2d2adc648e5625560e3ed199561d0e39d5",
)

text_encoder.load_weights(text_encoder_weights_fpath)
diffusion_model.load_weights(diffusion_model_weights_fpath)
decoder.load_weights(decoder_weights_fpath)
```

It seems to skip get_files(...) call and also load_weights(...). So this option is for randomized weights and only use it if you are training from absolute scratch?