Most people accept search warrants signed by a judge for a crime. Proton mail was even nice enough to notify the user what they were the subject of a search.

With Gmail/Hotmail/etc your communication are at the finger tips of governments for non-criminal domestic surveillance. For example it has been alleged that the NSA leaked private emails of a journalist in order to score political damage.

https://nypost.com/2021/08/11/tucker-carlson-unmasking-claim...