I think there are some confounding variables that make this analysis extremely difficult.
First off I'd like to establish that in the 90s film critics had no idea what audiences like, most of the famous film critics were film majors who values cinematography well above what standard audiences would rate it - a poorly shot movie with guns and explosions would be a box office darling while a black and white drama in the style of ingmar bergman would delight critics (I'm not badmouthing these movies btw - they just didn't tend to be audience favorites). Additionally, pre internet we essentially had no access to unprofessional opinions - hobby magazines and word of mouth were the only things that could counter a bad review from the globe or times.
Secondly, I think, like we saw with pretty much all "old media" that critics took their damn sweet time to transition over to the internet. In the early days of rotten tomatoes you'd rarely see newspaper critics within the tomatometer - those criticisms were the property of their respective media companies and they didn't want to give the milk away for free. As such it's taken a while for the professional grade critics to actually fully move into the new space - mostly by way of replacement. Old critics die and retire and new critics fresh out of film school start their career running a blog and being tech friendly.
From those two points, while I find the data in the article quite well calculated theoretically I think it's hard to really draw any conclusions - the conversion rate of critics would need to be better understood and the pre-internet critic inaccuracy would need to be evaluated. There are some great examples of films that were absolutely panned by critics but ended up being extremely beloved classics[1] and, then, we've got all the cult hits like RHPS which, when originally screened, had the vast majority of critics simply walk out on.
1. A NYT article about "classics" that got negative contemporary reviews on release https://archive.ph/kiDVH