I would counter your argument with a look at the crowds the WCC has drawn in Australia on the rare occasions it has been played in Australia.
1994 Broncos vs Wigan Crowd 54,220 (Their biggest of the season)
2014 Roosters vs Wigan 31,515 (A massive crowd for the Roosters)
2018 Storm vs Leeds 19,062 (Their biggest crowd apart from the Anzac day game)
I agree there isn't much love from many of the coaches but many fans get excited about it despite there been some who have no idea about anything outside NRL. It would really help if it rotated and was played in Australia every second year.