Not necessarily true at all.
We are taught all our years that our spouse will be the most important thing to us when married.
Married Chassidish couples are best friends. They might not look it cuz they would never act “mushy” in public.
Very true, and a good thing. One should not be “mushy” in public in any case, there is no need to announce what you are up to.
I would (IMHO, I am not a Chassid expert) rephrase & say thet the couple is expected to grow together after being married vs. falling in love before being married.
The dimyon is once again, Fiddler on the Roof. Once you are in that mindset, it makes sense.