I assume this is because of Muse? A lot of businesses block bots which stops Muse from being able to buy from those websites on a user's behalf. It seems like that'd be good for the businesses too.
For context, oembed data about your page could be seen as information you're basically happy to share, so other sites can create things like previews.
That's not necessary, there are other companies that just use different UA strings for the different tasks. They appear to deliberately make it so that if you have nothing to do with Meta and block their content scrapers, you also break basic functionality for people who happen to share a link to your site in their products.