Outside a college campus in California, nowhere else in the world do people ask for pronouns when they meet a person. It's not a normal human interaction.
https://www.pewresearch.org/fact-tank/2022/06/07/about-5-of-...
Similar rates in other countries:
https://www.aph.gov.au/About_Parliament/Parliamentary_depart...
You might not do it when you meet someone. But think about the sheer number of web forms, systems or standards that are about to have to go down a rabbit hole of whether they are modeling biological sex (medical systems), terms of address (people focused systems), etc.
Would you turn away 5% of your customer base because you didnt add a third option (ie: i prefer another term) when capturing someone's details?
Also, just to play devil's advocate, there are some people from the other side who could theoretically be annoyed by new pronouns as options and refuse to use your service because of it