It's about how it affects you. I would argue that most of us would like it to be true that there is some type of point to life which is perfectly good (at least that's how it is for me), however, we can't just blindly believe this to be true, we need a reasonable basis to do so, otherwise, that would affect our sense of judgement for other things. It could cause us to just blindly believe that other things are true, that are not true, and are even harmful for us. In philosophy, views need to be consistent, otherwise, we are inviting inconsistencies elsewhere in our lives. So, the internal structure of Flawlessism needs to be not only consistent, but our belief in it needs to be consistent with how we live our lives wisely. The issue with this is that I'm a limited person, I don't have awareness of everything, so to fix this, Flawlessism needs to be able to evolve through trial and error, but it also needs enough structure to last through that process of evolving through trial and error, so to do that, I made the core faith that a Flawless Good exists, so long as that remains possible, it's possible to continue to evolve Flawlessism even if mistakes are pointed out.
But by simply having hope/faith in there being a Flawless Good which exists, that would then mean other things must be true for that to be true, and that is how the entire structure of Flawlessism takes form from more than simple hope in the Flawless Good, but wisdom in other forms that can help us get through the hardships in life.
In the end, I would summarize the point of Flawlessism having hope in a way which is actually safe since it doesn't require blind belief. I see some other religions as basically being just that at their core, of people wanting to have hope, but feeling like there needs to be some type of trick to it, some type of understanding which needs to be gained. Christians seem to do this by believing that hell exists, that the ones who affect them negatively will be punished one day, that there's an entire structure to life which is why suffering exists, etc. it's this entire structure that allows Christians to feel like they're on the right path (I understand Christianity the best since I was once a Christian for many years, having been indoctrinated into the church when I was born. But it's because of this that I realize that not every Christian is the same, in that, despite seeming the same, some can be very different from each other).
Religions are a lot like buildings, they keep out the rain, and other negative things, causing believers to feel like there's something real to it, but from my perspective this is short sided because they are not willing to go outside of that "building" in order to better understand the world and that building's place in it. Flawlessism isn't like that because it encourages people to go outside of the "building" I have created so they can understand why I built everything the way I did, and possibly be able to point out flaws even I didn't realize.