To learn nuances, spoken language is quite important.

I am not a translator and English is not my 1st language (technically) - I'd have no issues 'hopping' on a call.

> To learn nuances, spoken language is quite important.

In my experience, it's quite the opposite: written language carries a lot more nuances than the (often more shallow) spoken language.

I do. My written English is orders of magnitude better than my spoken English - simply because I practice it a lot more.

I have no problem "hopping on a call" if it's a casual conversation between friends, but when stakes actually matter it would be stupid to put myself in a worse position than strictly necessary. Native speakers have a habit of talking a lot, talking fast, and talking with a lot of subtleties, nuances, and hidden meanings. In written conversations I can read a sentence twice and think a second about the right phrasing to use in response, but in face-to-face conversations this is simply not possible.

It would be like a professional debater like college kids "debating" with late Charlie Kirk: no wonder they end up "getting owned" - they are punching way above their weight class!