> Suffering, even pain, are like the opposite side of the same coin. You can’t have one without the other, so when facing struggles, try to view it as such; the necessary component in a fulfilling life.
This is true to some limited extent, but it seems wrong to think of the distinction between happiness is suffering as entirely or even mostly about contrast.
For example, consider a person who has, through some combination of disability, misfortune, and the malice of others, never had any positive moments in their entire life. If you had the power to do so, would it be unnecessary to help them out of their situation? After all, they have no happy memories to contrast their situation against. If you can't guarantee that they won't return to their previous situation, a contrast-based view implies that you would actually be doing harm by putting their past and future suffering into perspective.
When you have no say over what happens to you, contrasting a painful present with a pleasant past is a valuable coping mechanism, but it's also important to not justify suffering(especially the suffering of others) on such grounds in general terms.
To be clear, I'm not accusing you of doing that, just talking about what I've heard from other people on the topic.