And to my knowledge there is no technical requirement that F-Droid actually needs to build OR sign packages on behalf of anyone... I haven't seen any actual official rationale listed for it, but I assume one of the main reasons is convenience for the developers so they don't have to provide their own builds and deal with signing/losing keys.
I understand that the risk of problems can be somewhat mitigated in F-Droid by using reproducible builds, but I don't consider that sufficient for the most privacy-conscious users because:
reproducible builds are not required by F-Droid
it is not made clear to the user that a particular package even supports reproducible builds
the verification of reproducible builds is not made plainly visible somewhere publicly if at all
a user can still easily be misled by a one-off rogue package that is NOT reproducible, due to the previous point
independent verifications of those builds reliably made by others are not common
Conversely I stay clear of F-Droid as they build and sign packages on behalf of the original developers, adding yet another point of injection for malicious code or supply chain attacks.
In my experience... not really. I would say SDL makes the task of writing controller support code within your own applications easier and higher-level, but in reality it still has not much to do with "drivers" (I assume you mean kernel modules), which the kernel and OS stack already provide multiple unified interfaces for with things like jsdev/evdev/udev/hidapi, regardless of how you access those subsystems (via SDL or otherwise).
So far JShelter has been the best single solution I have found, it even prevents creepjs from working at all. Nothing is going to stop casual users from getting TLS fingerprinted though.
I also think people are blowing this WAY out of proportion and don't even realize their own hypocrisy.
Extreme example: Jewish people happily drive Ford cars, even though Henry Ford was the only American mentioned in Mein Kampf, specifically for his hatred of Jews.
My understanding is that tariffs in general can apply to both imports and exports, on either side.