Authorities in certain *cough* jurisdictions may still one day decide to pull tricks that anyone who contributes in any way to the development of Bisq or its infrastructure
True, but they could also one day do the same thing to bitcoin developers or even anyone they find mining or running a full node. Bitcoin of course wouldn't end or shutdown, it would be continued by people both fighting those laws and in the hundreds of other jurisdictions where those laws don't apply.
Google probably knows its average user better than all their loved ones put together.
I would say that's a certainty. Would you give your loved ones unrestricted access to your emails? Would you want your loved ones looking at your search or browsing history? Would you show them a complete history of everything you've ever bought online? Every site you've ever visited? Your location in real time, at all times? Would you want them knowing what kind of porn you watch? Google knows all this and more, if you use their products.