Tbh it’s pretty that’s complicated for a company in the current status of Nothing. Even Apple’s Siri is trash and almost no one uses it because of that, while Google is much bigger and has based much of its future strategy on large investments in AI so Assistant is far ahead everyone.
Basically it would not provide something that Google Assistant does not do, and it would be somewhat redundant/less functional than the existing option. However, it is an interesting idea for the future when the company grows.
In the meantime they should continue focusing on useful things that offer a little something extra compared to other options.