"obscurity isn't security" is true enough, as far as it goes, but is just not that far.
And "put the bugs that won't be fixed soon on a billboard" is worse.
The super naive approach is ignoring that and thinking that "fix the bugs" is a thing that exists.
Sure, in maybe 1 special lucky case you might be empowered. And in 99 other cases you are subject to a bug without being in the remotest control over it since it's buried away within something you use and don't even have the option not to use the surface service or app let alone control it's subcomponents.
(To put this in context: I assume that on average a published security vulnerability is known about to at least some malicious actors before it's published. If it's published, it's me finding out about it, not the bad actors suddenly getting a new tool)
remember we're not talking about keeping a bug secret, we're talking about using a power tool to generate a fire hose of bugs and only doing that, not fixing them
Google does contribute some patches for codecs they actually consume e.g. https://github.com/FFmpeg/FFmpeg/commit/b1febda061955c6f4bfb..., the bug in question was just an example of one the bug finding tool found that they didn't consume - which leads to this conversation.
This is true. Congratulations. Man we are all so smart for getting that right. How could anyone get something so obvious and simple wrong?
What you leave out is "in a vacuum" and "all else being equal".
We are not in a vacuum and all else is not equal, and there are more than those 2 factors alone that interact.