As with any software development company FDEV have to prioritise game breaking (not necessarily what the bug reporter claims to be game breaking) and bugs that they can fix easily for the minor patches and updates.
They do this because every change they make to this version has to then be incorporated into the next version and that leads to (further) delays down the line. In a lot of cases they may have already fixed the bug in their in house copy of the next major release, provided this bug isn't actually "game breaking" it's likely that rather than waste time modifying the current version they'll hold off until the next major release is ready.
Of course, there are bugs where the "fix" for them would be worse for the community than actually leaving the bug in place and living with it. A good example of this is bugs with the stellar forge, most of these would require a full reset of the galaxy or the game itself. This could mean that every player would lose some or all of their own progress, for an issue that does not effect most of the community.
Of course, there are some bugs that are limited to individual systems that most other players will never see. This could be caused by certain software/hardware configs that few, if any players actually use. These may take a back burner especially if the player can do something about it on their end (such as remove the offending hardware/software from the equation) or there are no other reports.
Basically, no, not every bug reported on the bug tracker will be fixed during the games lifetime. Quite frankly, if there was any software house that can eliminate every single bug on every single system that their product will work on I'd call them a liar, it is quite literally impossible.