The main focus of Tactis is to provide affordable hardware that can bring features like on-the-go learning and navigation assistance to visually impaired people worldwide.
I agree with your statement where you critique the choice of words on voice-to-braille conversion. The intended use of it is to help users learn Braille.
With only 8-10% of people with partial to full visual impairment knowing braille, Tactis aims to educate the rest by giving them the feature to feel and understand how braille is represented as they speak. With this being one of the features, and understanding that the user should not need to maintain any external piece of smart hardware while using Tactis, we have built it in a way that the device does not rely on any type of Android software infrastructure; it is based on a custom-built Debian-based operating system that lets bring the best performance out of the minimal hardware we can ship to keep the price point low.
The whole mission is to bring the cost down, so the mechanism used to raise the dots is also not what the most expensive braille displays have. Although it is not new, we are using an electromagnetism-based mechanism + latching to overcome the production cost pain point.
All of this just to acknowledge that there aren't many people in the world that needs braille to understand the world better, but just don't have access to learn it. So we had to build stuff into Tactis that not only focuses on the Navigation and content consumption aspect of the device, but also the braille learning point of it.
I hope this helps.