Do we Need a “Panglossian" Mindset in order to thrive in a relationship/Marriage?

As it pertains to maintaining healthy relationships/marriages, is having a “Panglossian”mindset, merely toxic positivity, dressed up with fancy vocabulary? What are the key differences between a Panglossian mindset and Krishnamurti’s concept of choiceless awareness, or the mindfulness concept of non-attachment?