I like to think that if they actually could demonstrate it in a transparent and reproducible way then I would be sensible enough to not just ignore it simply because it's something I don't want to hear, but I can't speak for anyone else there.
Congratulations, you are amongst a very small minority of people who are willing to not ignore something because it is something you don't want to hear and hope it goes away, or even
make it go away if you have to.
Humanity has a
long history of hating and fearing change, attempting to hide from or deny uncomfortable realities until literally forced to accept the alternative. For a relatively recent real-world example; see Climate Change, a
very uncomfortable reality that large swathes of the world's population are
still trying to pretend isn't real, or isn't as big a deal as it really is, despite the fact that it has been a well established scientific reality for
over half a century.
This isn't to say that such denial is guaranteed under all circumstances, but statistically speaking humans (the only intelligent beings we know of, and thus the only intelligent beings we can use as a model) when given a choice between confronting a problematic and uncomfortable truth or not doing that, will typically invest heavily in denial until doing so no longer works, and even then you'll often still see people desperately trying to cling to denial despite the reality coming down all around them.
Actually that leads to the question
@mp3.1415player have you got a solution for why the Thrax homeworld doesn't have a relay in it? As I explained above it makes no sense the Reapers would allow it to exist.
This
is the Cycle that the Protheans on Ilos interfered with, the galaxy is a
very big place, and the sector of the galaxy that the Humanx occupy was very sparsely populated with Relays which could potentially imply that it actually wasn't all that well explored by the Reapers in recent Cycles. So it's possible they only noticed Hiveholm in the last Cycle and the distribution of a Relay to that system was interrupted by whatever the Ilos Protheans did to hack the Keepers on the Citadel.
We don't actually know where Relays are built and how they are distributed to target systems after all; it would be inefficient for them to be personally built by the Reapers during each Cycle. It seems more likely that they would be constructed in some purpose-built facility kept in a special hidden location and distributed from there, probably hidden near the galactic core along with the Collector Base and sent through the Omega 4 Relay, since it seems unlikely that the whole 'hidden base in galactic core' and Omega 4 Relay was set up entirely in the last Cycle specifically for the Collectors; more probable that the Reapers just taped the Collectors onto something they already had, and the most likely reason for a hidden base in the galactic core connected to a special super-Relay would be for the construction and maintenance systems for the Relay network.
It's not like Shepard really bothered to explore anything around the Collector Base when they went there, so who knows what else the Reapers could have had hidden around Sagittarius A*; it
is a pretty good place to hide things if you have the ability to keep shit intact under those conditions, which the Reapers obviously do.