Why should America reflect world diversity? And how could it? Are there not enough whites in executive positions in Asia? The question doesn't make sense, because "enough" is a normative question and it's impossible to find a metric that's truly "fair".
Equality-of-outcome politics is one of the most dogmatic and dangerous movements in recent years, and it's incredible that it gained acceptance in all elite circles without any pushback. It's something that is fundamentally broken and unjust, because of widespread group differences. Have people here read the article in OP? They mention differences in education in different demographic groups. These aren't the only differences, so for example South Asians may be more likely to be engineers, but will be underrepresented in other industries, because of differences in majors and career preferences. Should equality be legislated?
Fight for equality of opportunity, and basta. This is a highly politicized and dogmatic movement that's trying to engineer the perfect society, and thinks there won't be any consequences.