Well, some of the densest, nearest, most interesting structures are right behind the rest of the Milky Way, which causes up to 30 magnitudes of extinction in visible light, but deeper IR and UV passes through much more easily.
I think a better way to describe the issue is that much of the structure of the cosmos is only visible in non-visible wavelengths, so while calibrated, accurate visuals "like you were in a safe glass bubble" is a good category of astrophotography to continue to refine, it's a tiny slice of what's emitting electromagnetic radiation that's worth visualizing. And if cameras can convert invisible colors into visible ones, that's a blessing of a capability.
Can we infer what that visible light would look like unobstructed and with appropriate intensity to activate our eyes' cones?
What's the license?
The Berlin Declaration that defined Open Access https://openaccess.mpg.de/Berlin-Declaration defines it as follows:
> 1. Open access contributions must satisfy two conditions:The author(s) and right holder(s) of such contributions grant(s) to all users a free, irrevocable, worldwide, right of access to, and a license to copy, use, distribute, transmit and display the work publicly and to make and distribute derivative works, in any digital medium for any responsible purpose, subject to proper attribution of authorship (community standards, will continue to provide the mechanism for enforcement of proper attribution and responsible use of the published work, as they do now), as well as the right to make small numbers of printed copies for their personal use.
> 2. A complete version of the work and all supplemental materials, including a copy of the permission as stated above, in an appropriate standard electronic format is deposited (and thus published) in at least one online repository using suitable technical standards (such as the Open Archive definitions) that is supported and maintained by an academic institution, scholarly society, government agency, or other well-established organization that seeks to enable open access, unrestricted distribution, inter operability [sic], and long-term archiving.
This page is all about #2. What's #1?
I'm delighted to be able to read and share the classic CACM articles that have shaped the history of informatics, thanks to the ACM's policy changes over the last few years. The other day, for example, I was reading Liskov's paper on CLU in which she introduces the abstract data type: https://dl.acm.org/doi/10.1145/800233.807045
But, as far as I can tell, neither that web page nor the PDF linked from it has a license granting "a free, irrevocable, worldwide, right of access to, and a license to copy, use, distribute, transmit and display the work publicly and to make and distribute derivative works, in any digital medium for any responsible purpose." So, if I post it on my personal web site, or upload it to WikiSource or the Internet Archive, I'm still at risk of copyright lawsuits. And until I can do that, I only have access to the paper as long as CloudFlare thinks I'm human.
That's the problem Open Access is designed to solve.