Your two statements are contradictory.
They're not. Holding a copyright on a work does not confer one with complete authority as to how that work may be used. The rights which comprise copyright are relatively few; further, they are themselves limited in a number of respects.
For example, copyright on a book does not include a right to prohibit other people from reading the book. The list of exclusive rights that together form a copyright can mostly be found at 17 USC 106. (Again, only for the purposes of US copyright law; I have no idea about foreign copyright law, and I don't care to)
And posting a picture on your website doesn't tell or demonstrate anything.
The conduct of doing so, assuming a website open to the public, is an implicit license to anyone to access and view it (and to make incidental copies in the process of doing so).
If I happen to know that the Mona Lisa hangs in the Louvre, there's nothing wrong with my telling people to go there to see it. And if I happen to know the URL of your picture, there's nothing wrong with my telling people to go there to see your picture; this is so whether I provide people with a link to be manually followed, or an embedded link to be automatically followed such that the picture appears in the web page. I'm not copying it onto my website or anything.
First sale is not profiting in a commercial sense.
It is absolutely that. A used book store will sell copies of works for a profit, because it is a commercial enterprise. It is totally reliant on the first sale doctrine. Ditto however many independent video stores still exist (since it's perfectly legal to rent lawfully made copies of movies that you own).
Commercial use is not fair use.
Well, where the hell were you when the Supreme Court needed your input in 1994 in Campbell v. Acuff-Rose Music?
There the Court not only found that a commercial use certainly could be a fair use, they even said that it is wrong to treat a commercial use as being presumptively unfair. Commerciality is just an element to be considered, and that's all:
If, indeed, commerciality carried presumptive force against a finding of fairness, the presumption would swallow nearly all of the illustrative uses listed in the preamble paragraph of Â 107, including news reporting, comment, criticism, teaching, scholarship, and research, since these activities "are generally conducted for profit in this country." Harper & Row, supra, at 592 (Brennan, J., dissenting). Congress could not have intended such a rule, which certainly is not inferable from the common-law cases, arising as they did from the world of letters in which Samuel Johnson could pronounce that "[n]o man but a blockhead ever wrote, except for money." 3 Boswell's Life of Johnson 19 (G. Hill ed. 1934).
But then I guess you already knew everything you wrong was wrong since you fell the need to try and make your point using an insult.
'Everything you wrong was wrong?' What the hell is that?
Anyway, I called you an idiot because you're clearly an idiot. It had nothing to do with my actual argument. But my advice to you is that you have no idea what the hell you're talking about, at least within the context of US copyright law, and you would do yourself, and everyone else a great service if you'd shut the fuck up and learn something from a legitimate, neutral source before you next presume to talk about it.