That's like saying the source code of a binary is a bunch of hexadecimal numbers. You can use a hex editor to look at the "source" of every binary but it's not human readable...
Yes, the model can be published without the dataset - that makes it, by definition, freeware (free to distribute). It can even be free for commercial use. That doesn't make it open source.
At best, the tools to generate a model may be open source, but, by definition, the model itself can never be considered open-source unless the training data and the tools are both open-source.
You're talking about assembly in a thread about OOP...