This is another one of the Pac's numerous failings. In the 2010s, when Texas stayed in the first realignment, the "have nots" of the conference invested the media revenue wisely in sports infrastructure and in methods to increase fan engagement and revenue. While they won't catch Texas, they transformed the conference. Iowa State brought in around $45m back then, they've more than doubled that in a decade to $112m. Kansas State doubled theirs in that time and most others jumped from the $60s into the $100ms. Matter a fact, all of the Irate 8 have increased their AD budgets over $100m, which is sort of the line in the sand for the top 50 schools. Granted, they all need to bump that up into the $150s in the next 5 years, but their books are healthy.
This is not the case with the Pac. Their haves continued to have, but the have nots didn't keep up in the same fashion. Most all of the schools use an unhealthy amount of school funds to subsidize the athletic departments and they've been the most financially weak of the P5 conferences for a while, but the OSU/WSU are special.
Oregon State and Iowa State, who had the smallest AD budget in the Big 12 a decade ago, were pretty similar in 2013, today Iowa State brings in $23m more per year. And it does that without taking any school funds (outside charging the students ticket fees in tuition). Oregon State got to its number with $8.5m in school funds, meaning the clones make $30+m more per year than the Beavers with a similar media deal.
Washington State is even worse and, to your point, they are the lowest revenue generator in the Power Five. It takes $14m in school funds, meaning its true revenue is only $69m - and 65% of that is rights and licensing! For comparison, Central Florida made $89m in that same year, but without a power five media deal.
Oregon State and Washington State, regardless of history or success, just don't operate like a power five athletic department and are far closer to Air Force, SDSU, and UNLV.