I created a google takeout and in that zip file I found some files containing a ton of data about me. It has logged every single page I visited while using the google search engine and chrome browser. It even logged every single time I opened an app on my old android phone. It even has VOICE RECORDINGS of me and a log of every time I used google assistant. This is just some of the data and I’m very sure there is even more data they have.
No, Tails doesn’t solve this issue at all. It’s built for maximum anonymity, not security. It also uses Tor for all connections, which will get your bank account locked immediately. Qubes is a good option for security, but it’s way too complicated for most users. Stop making up some random shit and accept that mobile devices running modern operating systems are reasonably secure and definitely more secure than your ordinary desktop.