However, I personally feel that this is an interesting and valuable question where the MathOverflow community can provide insight that would not be readily available elsewhere.

That argument could apply to lots of off-topic questions, so I don't find it convincing. I suggest that we stop considering "but I want to reach mathematicians, and this is the largest community of them" as a valid argument at all. This criterion is too prone to abuse, and could apply to just about anything, for instance to an advertisement for office chairs.

You should not argue why it's good for you to have this question on MO; it's about why it's good for us to read it. If you cannot find more compelling reasons why this question should be considered on topic, in my view this is a red flag.

However, I personally feel that this is an interesting and valuable question where the MathOverflow community can provide insight that would not be readily available elsewhere.

That argument could apply to lots of off-topic questions, so I don't find it convincing. I suggest that we stop considering "but I want to reach mathematicians, and this is the largest community of them" as a valid argument at all. This criterion is too prone to abuse, and could apply to just about anything, for instance to an advertisement for office chairs.

You should not argue why it's good for this question to be seen by mathematicians; it's about why it's good for mathematicians to read it. And why it is on-topic on a Q&A site about mathematical questions, rather than on a blog, a news site, or another SE. If you cannot find more compelling reasons why MO is the right site for this question, in my view this is a red flag.