It’s not 45% of revenue expensive.
The fact that we’ve accepted such ridiculously high profit margins from tech companies is simply due to their network effects monopolies, and the impossibility of competing with them.
Just look at any other marketplace business with more competition, like say a grocery store or any brick and mortar retail. Their net margins are often sub-5%. Physically shipping goods across the world is far more expensive than delivering video.
Only other monopolies, like Governments, can get away with charging 45% taxes. Having known a few Youtube employees and also a few federal government employees, I would say the low stress, low effort, low fear of layoffs, low work output expectations are...ahem...similar.