Coding speed is absolutely not the problem that needs solving. What is needed is how to do more with less code. Long term maintenance of massive code-bases is the hard bit that eats away at productivity.
Writing unit tests faster absolutely encourages me to write more thorough tests. It’s less about speed to me and more about painlessness. It’s good at the most boring snippets, which I’m happiest to offload.
Treat it as a mildly better autocomplete, and you’ll be happy with it.