Pay some random guy on the internet to upload for you. Yes, your voice will get you identified. Keep in mind that even a voice filter won’t be enough to protect you from authorities. Some people use AI voices instead of theirs to stay anonymous
Protonmail, their flagship product, actually treats 99.9% of emails in clear-text. You can’t have end-to-end encryption if the other person at the end doesn’t support it. There have been (unverified) rumors that Proton could be a giant honeypot. They did help authorities in the past. Maybe we will understand better who they are in the future
The issue here is that you could potentially read the content of a 2FA sms that wasn’t intended for you. It makes it easy too break 2FA if you have many devices