"isn't hackable" isn't feasible to the layman, and I'd argue for even security professionals. You can take measures to make it difficult to hack, but to say you can make a system unhackable through those means is false as well.

There are just too many layers of abstraction to exploit to say a system isn't hackable.

Greenwald also used cryptocat at a time when its crypto could have been broken by an NSA intern in an afternoon. "Greenwald uses this" is perhaps not a ringing endorsement of a product's security.

Until an intelligence agency manages to bug your home or image your machine like it seems they sneakily did with Ross Ulbricht (by stealing his laptop).

And in a lot of countries you are automatically jailed for not handing over your encryption keys when asked.

Could you provide a citation for "automatically jailed for not handing over your encryption keys" - I have not heard that before.

RIP Act in UK. Certainly detained (witness what happened to GG's partner in LHR).

Not automatically jailed, but can be jailed when they want the key and not turned over.

Tails is definitely hackable through the browser.