2 of those majors were with the same core of Notail, jerax and ana. The others weren't. People care way more about the TI wins than those majors; last year OG won 2 majors with bzm and Yuragi, but fans would drop them in a heartbeat if it meant ana and Topson would rejoin the main roster - even though neither has proven themselves at the highest caliber in ages - simply because of their mythical TI wins.
Like I said, the OG lineup which won TI twice did not win anything else, consistently placing 7-8th at other tier 1 events in 2018-19, whilst teams like Secret, Vici, LGD, Liquid and VP consistently won majors and other big events throughout that time, but those wins are an afterthought for most people, as they are massively overshadowed by OG's TI wins.
TI is simply too big for its own good. The Saudi thing looks nice at first, but look at the ridiculous prize pool it takes to rival TI. This simply cannot be sustained, especially since Dota's player numbers have been on the down since 2016.