Macau is in China and we all know it's not a country where people doesn't really like to visit compared to Last Vegas and Asia is more conservative towards gambling which might be another reason. Vegas is not only famous for Gambling but also tourism across the world and it's becoming a must visit place in everyone's life.
That is backed by data...
https://vegasprimer.com/las-vegas-visitor-numbers/Here are the visitor growth statistics over the past 9 years:
2023: 40,829,900 (+5.15%)
2022: 38,829,300 (+20.47%)
2021: 32,230,600 (69.36%)
2020: 19,031,003 (-55.25%)
2019: 42,524,000 (0.97%)
2018: 42,116,900 (-0.23%)
2017: 42,214,100 (-1.68%)
2016: 42,936,100 (1.47%)
2015: 42,312,216 (2.88%)
2014: 41,126,512
The significant drop in 2020 was likely due to COVID-19 restrictions, but now that those are lifted, things are back to normal, and numbers will keep rising year by year. While Macau does get over 30 million tourists, which is impressive, it still doesn’t surpass Las Vegas.