I wouldn't be able to stay in a role where I had a very loud colleague. Add into that, that she seems to have a very combative style and "I can't help it" seems to be a weak defence.
There are some people who make the working environment untenable for their colleagues. When one person makes it pretty impossible for anyone else to work, it has to be addressed, whatever their sex/ehtnicity/natural style.
for the hour I'm visiting someone in hospital I would have to concentrate very, very hard to keep my voice within an expected parameter. Which is fine for the hour I'm making small talk in a hospital
To do it for 7 hours in an office when I'm dealing with work, stress, motivating others - that would be intolerable. It would take up so much of my head space that I wouldn't be able to communicate properly and therefore do my job.
I'm sorry @EmmaH2022, but the sound of your voice would take up so much of my headspace that I wouldn't be able to do my job. I get that it's something you don't seem to be able to control, but I (and I'm guessing others) wouldn't be able to control our reaction either.
It's shit all round really.