Great if other methods can work. I know many people who would benefit from that. But I highly doubt that they're as cost effective (as in, free), or, as accessible (as in available almost every single day at all times during the day, or, 24 hours online).
AA is trending toward more secular structure. It's evolved a lot. I'm reluctant to call it "Christian," especially since atheists, Buddhists, agnostics, Wiccans, and many others utilize the model without having to convert or show allegiance/belief in a deity. (Arguing about Step 3 and "the higher power" is a pretty stock point these days as anyone familiar with the current program knows this is not a requirement and anyone can google "atheist step 3 AA" and find thousands of hits and many alternatives to that.)
But, all of that said, it's difficult to expect everyone to be up-to-date on AA trends and new paradigms. People tend to assume that it's all Jesus talk and proselytizing. And it's very difficult to get the proverbial dog to drop its bone on that point of contention. AA PR and Marketing would really do well to clarify these things in a very overt and public manner.
Also, I think that for some people abstinence is the only path. For others? Moderation might be possible. If we could (as a society) drop the negative stigma about addiction, AND at the same time, find a way to provide affordable assessment tools so that we could help an addict find the BEST PATH possible, then we could feasibly get a lot done.
The issue is, how? How many chances do you think an addict is willing to take to find the perfect method? Two times? Five? Ten? There are so many other methods out there. Where to even begin?
AA is the go-to method because it has that built-in support system, the ease of access, and the price is unbeatable. And it's not perfect. But until we find a way around these obstacles (price, accessibility, and constructive assessment), it's the best option for many. And I know that's not necessarily a good thing. It's likely keeping a lot of people away based on preconceived biases about how they think the program runs. Or, the idea of giving up a substance forever.
There is no easy answer. And while I think it's great to consider options, it's counterproductive to assume that addicts are going to have a great deal mental resources, patience, and finances in order to find "that other method" that works better at this point.