Some of my Asian friends were still living with their parents at 25 years old and apparently enjoying it. I've seen it in Vietnam, Taiwan, and Singapore, so it appears pretty widespread.
I know at least one guy who easily could have purchased his own apartment in Singapore. But he very much enjoyed having relatives visit with their small kids, as they would cheer up everyone by being silly. So he stayed at his parents place until he got married and started making kids of his own.
And yes, he probably saved lots of money that way, too. But I'm sure he didn't need to. He was the CEO of a well funded startup with a $50mio+ exit. Also, he sometimes invited friends (like me) and coworkers to his parents place and nobody thought that was weird.
It really is a US / western cultural difference.