Probably because the BGS effects virtually everyone that plays and if it isn't working properly then it effects virtually everyone that play negatively.
Except not really.
I've argued in the past (fairly unsuccessfully, it must be said) that they could have replaced the BGS years ago with an actual random number generator entirely unrelated to player actions, and it would have had no substantial effect on gameplay for nearly everyone, excepting the relatively small group of people who are effectively playing an RPG in their heads on top of the actual game as it exists in reality.
Now they've actually gone ahead and done just that, albeit accidentally.
But to me, as a player playing in my own charismatic idiom, it doesn't really matter which RNG-named minor faction runs a station, or what government type it is. They all use the same currency, even the communists and anarchists. They all sell the same stuff. The missions change a little from time to time, but for a player like me (technically a "casual player" but with 10 billion in the bank) it doesn't matter whether the very, very slight variations on mission types is because of a group of players grinding away at one activity for a month or just RNG. The effect is the same: I go to another system where the conditions favour what I want to find and there are thousands to choose from so I never have to go far.
It's a facade. The BGS is like a beehive, where 99% of the bees are scripts. Bees are beautiful in their own way, but almost mindless as individuals. Close up, they're all very busy doing something very hard to discern. Back off, and it's just one monotonic buzz.
The single effect the BGS being fried has on me is the knowledge that the galaxy is now officially a lie. It does affect the way I perceive the game's worth. But it doesn't actually result in
any changes to the way I play. (When I play, which is almost never.)
Same with the FSS to be honest. I'm not a screenshot hunter so it doesn't affect me. I guess the only time I might use it would be to find a signal source. But hunting SS for mats is so tedious that I'm more likely to literally find the nearest one and then trade them. So I don't actually
need different types of SS spawning in different system states any more, as long as the timesink of getting six times as many of them is about the same as the timesink for hunting for one specific type.
*shrug* Blaze your own trail.