I think that is the case: having 'religious faith' is inherently subjective, and variations of the trappings of religions probably reinforce that.
It may be that some faith-based conclusions do have more general application, and that non-theists could arrive at the same conclusions but without a religious faith having any role. For example, valuing altruism isn't dependant on having pre-existing religious faith.
Agreed that the same value can be expressed in religious or non-religious language.
And amongst theists, some might express a value through a story that they consider to be metaphorical, while other theists might express the same value through the same story but take the story literally rather than metaphorically.
However, where there is attempt to impose certain moral beliefs on the basis of religious faith so that they become social policy for society at large is, I think, more problematic. The issue of same-sex marriage legislation in the UK is a recent example, which religious organisations such as the C of E opposed on the basis of it be contrary to their religious doctrine and would have preferred it if social policy aligned with their religious doctrine - which didn't happen in the end.
Ok but there isn't an objective right or wrong when it comes to moral values e.g. same-sex marriage.
Different people predict different consequences of adopting a particular moral value and have different opinions on how much they prioritise the desirability or importance of the predicted consequence e.g. the slippery slope argument in relation to morals - not just about same sex marriage, but also about assisted dying and other moral issues.
For example, loosening restrictions in society leads to people wanting to push boundaries further. So when Stonewall wasn't expending most of its energy fighting for same sex marriage anymore, it suddenly had more time on its hands to fight for trans women to be included in single sex female spaces.
It's possible that some people who don't fight to liberalise a particular rule may just prefer the status quo because they want to keep the line in the sand where it is now, rather than having to fight the next push for liberalisation that they know will inevitably come, once the current restriction has been lifted.
I imagine that many people don't decide what is the right or wrong decision based on just the limited circumstances they are currently confronted with - I think many people look ahead and anticipate possible permutations and combinations and future decisions they may need to make as a result of the choice they make today about the circumstances and issues they face today.
So I do think that personal religious faith, and conclusions based on that, might not always have value for all.
I don't' think many moral values, and conclusions based on them, have value for all does it? Moral values presumably depend on context and time and place?