Joanne,
No disrespect, but I think you are severely misjudging the strata of folks you are talking about.
Those:
"who just want a song for their loved one on their anniversary or their daughter on their 21st or their dog."

Are unlikely people to spend $200-$600+ on a software to "write" (if you can call that writing) something occasional for the causes you mentioned. What I think LIKELY would happen is that they will use some kind of a free online (AI assisted) service or $2-$20 a pop AI created tune. Or subscribe to such online service(s). Like advanced "Hallmark" postcard store.
Fortunately BIAB, for the most part is not about that.