Language is, primarily, a verbal activity.
The written layer was added much later.
That's why isolated tribes have verbal language.
But not a written one.
The fundamental premise of learning language via written conversation is, IMHO, a bit shaky.
I think it depends on what stage your at. With English as my first language, I certainly improved my vocab massively and was aware of a lot more things like idioms/styles of speech once I was old enough to read independently.
Found that too learning French that once I got enough proficiency to read was really useful in the amount/style of French I could expose myself to and helped me push up past a plateau of confidence in my spoken French (though not fluent still, so just IMO, take that for what it's worth!)
I'd say writing and speaking are certainly two very different skills which I am sometimes painfully made aware of when my words in foreign languages flow much slower and less eloquently than my fingers on the keyboard, but I believe there still is a high degree of synergy.
I think there is value in learning to be fluent in different forms of communication when learning a new language. The good news is that you can definitely practice verbal communication with LearnLingo. You can find this through the Audio tab (or at https://www.learnlingo.dev/audio). Let me know what you think!