Security is always a trade-off between convenience and... security. To each their own on that. But this is one reason I really like Samsung's Secure Folder option, and wish Apple would adopt something similar. The Secure Folder allows you to have an additional sandbox inside your phone that can require additional verification (pin, pattern, passcode, etc.) that's different from your main gatekeeper. So you can put the more important stuff in there, while keeping the stuff you want to get to with less security/more convenience at the main level. Not sure if I worded that well... but hopefully the point makes sense!
Edit: And as a side benefit, you can have to separate secure sessions with the same app on the same phone...