I second this. It can take multiple man-hours among native speakers to craft an email in a politically-sensitive, high-stakes professional environment.

I worked under an executive who would keep her people (inner-circle advisors, direct reports, etc.) huddled around her desk all day as she slowly wrote and rewrote email responses to her boss(es) and executive peers. I hated having to go to her office for things because it was so easy to get pulled into that circle and feel like there was no escape.

I'm a native speaker who has attained near-perfect scores on the verbal sections of the SAT and GRE, and I like writing, but I'm still a very slow writer myself.

I don't know about anyone else, but if I find myself in a job where I am fretting over each email I send, its time to find a different job.

You're not wrong. Fortunately, I was insulated from a lot of that climate, got what I needed from the job, and moved on. I definitely don't aspire to more senior levels of management, certainly not in this organization, after seeing that and other things.