As a long-time Gentoo user and supporter, my main issue is the time investment. Not the investment in installing and initial setup, not compilation in the background (binary packages make things much easier today), but staying up-to-date with software upgrades and changes. I did not mind it before the "life happened", but now when it takes even one available night in a month or two, it seems a lot.
Other issue is when you need something promptly, if nothing else to test it out or one-use only and you either have to wait or use something like official binary/flatpak...
Whenever I think that the time I invested in some of the mini-projects is lost/wasted time and that it was probably better choice to do just about anything else instead - I come across something like this. The only thing I can conclude is that there is no such thing as wasted time, as long you enjoy the road.
This might be too harsh... Do not think it is betrayal, but it is idiotic and can understand someones frustration with it. On par with FreeBSD developers using MacOS to develop their OS.
People easily install these without being concerned about security or privacy. I am actually more curios if these are audited at all or the risk is solely on users?
I use GNOME only in throwaway VM, but even there - only the extensions available in official repository are used.
If you cannot audit it and supervise it, do not offer a point-and-click way to install it. Do not rely on end-users experience and sanity nor the good intentions of random people online.
Installation of Gnome extensions or KDE themes (unless official package from distribution's repository is used) always seemed as unnecessary risk to me.