You are describing a theoretical construct, while uxgpf describes (current) reality. So, it's pretty arrogant to tell him, that he is wrong.
You state a theory as a fact, so you don't have to describe what your theory is based on. It at least doesn't seem to be based on current events.
Unfortunately, you're wrong too. uxgpf is describing future projections also. All his statements are predicated with logical conjunctives like "if", "will be" and "would be". And he doesn't state what his projections are based on either (I would say that for us both we are using a combination of economic and systems theory)
His prediction is based on the past and present. I know, that this is not an optimum, but it is still better, than what you have presented so far.
I just don't get, why anybody would think that fees would go down, when blocksize increase(besides "supply and demand" which is an oversimplification of how economies work)
Well, you'll find that not everyone has the patience to wait for it to click for you, but suffice it to say: increasing the block size
too much will cause fees to collapse. The author of the BIP I am opposing will tell you the same thing.
In addition, simply saying something doesn't make it true, no matter how many times you repeat it. My analysis is also based on observations made both in the past and the present; I haven't once claimed to observe events in the future (or implied it). It'd be an impressive feat if it was possible though lol