Also, this rule prevents people from all "minority" groups from directing questions to any "majority" groups. I can imagine many situations when it would be useful for a "minority" group member to make inquiries solely of people who come from a particular "majority" group. For example, a person who is one of a small number of racial, religious or immigrant minorities at work, school or in a community or country might have lots of questions about terminology used & behaviors displayed by the majority group, as well as about their customs.

For many years, I as a white American worked in refugee resettlement and taught English to newly-arrived immigrants to the US who were of virtually every nationality under the sun. Much of my job was explaining - and answering questions about - the mystifying ways of the "majority" US population(s) to my clients & students, which was for their benefit. I wasn't oppressing them or enforcing "my ways" or the ways of the majority on them, I was helping them navigate and best survive in an environment that was brand-new and often extremely confusing to them - and which was full of people quick to look down on them, treat them unfairly and/or take advantage of them.

In particular, many of the girls and women who came from certain non-Western countries really needed to get clued in on US sexual mores and norms so they'd be able to spot male sexual predators, pick-up artists and lying Lotharios and be on the defensive against them. It would have been extremely unfair - and harmful - to tell these girls and women they couldn't turn to members of the "majority" for advice on decoding and dealing with the behaviors and harassment of the men they encountered when out and about in public in their newly adopted country.

Also, whomever made up this rule seems unaware that although women make up the majority of the population numerically, historically women - even white women in white countries - were treated as lesser and for all intents and purposes - even in legal definitions - were considered a "minority" group. Even today, there are plenty of situations in which female people regardless of other factors like race and age constitute a numerical minority, such as in STEM, most tech/Silicon Valley/IT workplaces, the executive suites in the corporate world, and the corridors of power in the US Congress, White House, state legislatures and governors' mansions, and municipal posts like city councils and mayoralties.

Finally, I note that this rule-maker has decided that "20-30 year olds" make up the "majority" age group in the US, but this isn't really true. People of that age (especially males) make up the single largest age band out of all age bands at present, but an age group that counts as 22% of the populace is certainly far from being "the majority" in the US. Also, many other age bands come pretty close to that one in size.

Moreover, the age distribution of the US population varies depending on sex. For example, the proportion of females who are age 55-64 is nearly as large as the proportion of females who are 20-29.

One of the reasons males age 20-29 make up such a vastly large proportion of the male population is coz males overall don't tend to live into old age at nearly the same rate as females do.

https://www.statista.com/statistics/241488/population-of-the-us-by-sex-and-age/

https://en.wikipedia.org/wiki/Demographics_of_the_United_States#/media/File:US_population_pyramid_(2020).jpg

The age distribution of the US population also varies enormously depending on race and ethnicity.

https://www.pewresearch.org/fact-tank/2019/07/30/most-common-age-among-us-racial-ethnic-groups/