Even if the encryption is sound, some day in the future laws can be written that compel a citizen to relinquish their passwords. In 2000, the UK passed a law called RIPA that can be used that way. They say it is only used in emergencies, but who is to say what constitutes an emergency.

https://thblegal.com/news/can-i-be-prosecuted-for-failing-to...

Of course, technical solutions are only helpful for a small portion of the population, while the default is what happens to most people. Since this is Hacker News, for plausible deniability for forced password disclosure, you can use VeraCrypt hidden partitions.