Sure, they could give a free soft license for Elements with a Pro purchase… The grocery store could also give free hamburger buns when you buy hamburger patties. But the fact is that it is a product with a value and they a running a business. If they give it to you, you won’t buy it. It is all part of the equation that determines what price they sell it for and what the consumer is willing to pay for it.
That being said, will Elements really work on the road? There are a lot of features, content and plugins that don’t work with an Elements license. Which means if you start you project at home with a Pro license and use Revelation, or content from the Artist presets, or something like that, now you can’t work on your project without your Pro license.
If you want to start a project on the road such as just recording the basic audio of your band, then the AI license is great for that if your audio interface came with it. If they were going to give away something free AI would probably be a better choice. It compares to S1 free or PT free and might attract new users into the franchise and allows Pro users to start basic project functionality without the USB license.