I ran a movie projector in college, and for a few years after, I was the fill-in at my old job at the art house, so I have seen a LOT of films. I will admit that since my son was born, my film viewing took a nose-dive, but for my first nearly 40 years, I was definitely a cinephile-- OK, maybe you could say, starting when I was about 10, so 30 years.
10 was when I noticed that Hollywood made other things besides monster movies. I saw the Ingrid Bergman/Spencer Tracy version of Dr. Jekyll & Mr. Hyde, and suddenly wanted to see everything those two performers did. Everything from Boys’ Town to Indiscreet. Then I wanted to see everything the other actors in those movies did. And the other actors in those movies. I had lists, and cross-lists, and checklists. Every week, when the TV schedule came in the newspaper, I’d look at the movie list: anything made in the 30s and 40s was gold. Maybe a few things made in the early 50s.
Anyway, yeah, there is a certain amount of truth in the statement, as very generalized, but it’s very easy to point to exceptions.
However, even when you have exceptions, you see where there are differences that contribute to the “general.”
Take the following as VERY general statements. Please don’t fire back specific exceptions, and expect me to defend the statements in the face of them. It’s like arguing that English is spoken in the US-- not that no other language is.
In European “get the couple together” movies, the complications arise from personality, and social mores; in Hollywood, they arise from wacky antics, and random disasters.
In Europe, movies about long-time couples tend to focus on ordinariness, and how people deal with ordinary stress-- even if they are a royal couple, how do they deal with a death in the family, as opposed to an alien invasion. In Hollywood, movies about long-term couples tend to deal with really hard-hitting stressors, be they natural disasters, nuclear holocausts, or contagion. Even if they are biographical (about real people), they tend to focus on a really difficult part of their lives.
Hollywood produces atmospheric movies, but they are nearly always suspense or horror films. It’s rare to have an atmospheric love story-- and when there is, audiences don’t know how to deal with it. Almost everything Asian (which is to say Chinese, Japanese, Korean, etc.-- specifically excluding Bollywood) is atmospheric, but this goes way back to theater traditions in those countries.
Godzilla is atmospheric; if you can, find a subtitled version of the Japanese release, without the Raymond Burr inserts. It is actually a very impressive movie, that was not available to the US until about 2000. Look for it to be titled Gojira, if you want to see what they saw in Japan in 1954. The obvious costume of the actor walking around playing the monster makes sense in the original, because it’s much more theatrical.
Anyway, European films tend not to be atmospheric, because there has always been a push for realism in films in Europe. You see it less in British films, but continental films are really gritty, and improvisation among actors is encouraged, both in Eastern and Western Europe.
Hollywood films have been escapist, since the onset of sound (and the Depression), so they are polished and glitzy. Everything is prettier and cleaner than it is in the real world, even literal dirt.
America has produced lots of atmospheric films, but they have tended to be independent. And the atmosphere is hard to compare to the atmosphere of Asian films. Spike Lee produced some very atmospheric films, but they are also hard to compare to anything. Do The Right Thing and Summer of Sam were highly atmospheric, but also very American.
Those are observations from many years behind a projector. I have seen the same movies repeated times, and I have seen more European, Asian and Central/South American films than the typical American (I also have lived in New York City, and in Europe, in addition to running an art house projector in Indiana).
But FTR, though I have read lots of books on films, and have several film studies professors among my acquaintances, I have taken only a single class in film studies (Black [ie, African-American] Films in America).
So take my observations for what they are.