If you are a company based in Europe it is silly to give your data security and privacy to a company based in Europe.
If you are in Iran, you don't want to give your data to your government.
If you are in France, you don't want to give your data to your government.
etc
If you are in France, and you host your e-mails in a datacenter in Hong-Kong, well good luck for the authorities to get it.
If you host it in "secure France", on the paper you will have more privacy and laws behind you, but in reality you are jumping into the mouth of the shark.
This is why governments are promoting: "yes yes, host here don't worry, we will protect you"
> well good luck for the authorities to get it.
"We want your data on X, here;'s a warrant."
"No."
"You are now under arrest for contempt of court."
People have some oddly silly views on what government can and can't do to people living in their territories.
And companies really really don't care if the government has their data.
> host your e-mails in a datacenter in Hong-Kong
Now China has it, gives it a competitor in China and your market share drops like a stone. Congrats! Great choice!
This flat out isn't true. Police forces / investigative authorities have been collaborating with one another since 1923: https://en.wikipedia.org/wiki/Interpol . We have tons of examples of this working for the digital world as well (like Proton complying with Swiss legal orders at the behest of non-Swiss police forces for illegal activities in other countries).
The trick is to host your data in a country with a strong rule of law, and avoid illegal / geopolitical lines. If you're an American company hosting stuff in Russia, you can bet the GRU/SVR would be very happy to abuse it. If you're running a torrent site in Ukraine, you can bet the US would be very happy to claim extraterritorial magic jurisdiction and get you extradited from Poland.
As a French company, you're already beholden to French law and French legal decisions. "Data is hosted in Hong Kong" doesn't matter in the slightest, it only exposes you to more risk.
It's not about government but about trade secrets...