Yang Li's talk shows are usually about men and women, calling for equal rights between men and women, and now they are even regarded as spokespersons for women's rights. Grandma Lu's eating at the dinner table is an anti-patriarchal pursuit of women's rights, so He's guess is reasonable and funny.
More strictly speaking, this rule is called "men and women don't sit together". In our hometown, men and women can't eat at the same table for formal banquets. Male guests drink at one table, and female guests open another table. All the seats are exactly the same, there will be no difference. Therefore, although men and women are not seated in the right place, there is absolutely no intention to discriminate against women or make women inferior.