I've been thinking about this a lot, and agree... I think fees will go up in dollar terms, but will go down in terms of sats over time due to price appreciation... However, those two dynamics may not always happen at the same time so we may have to wait out certain periods, while the free market sorts out usless jpegs for example.
Discussion
In the time of low fees, the security budget experts come out and talk about increasing the number of bitcoins to keep #Bitcoin miners around.
They all disappear and are replaced by people, concerned about fees being too high.
Both are extreme cases that will never last long before they got fixed.