At least Twitter lets you send a link.
Instagram doesn’t support links at all. So if you want to share something off Instagram to Instagram, your only choice is to screenshot.
Or tell people to click the link in your bio which, to be honest, most people won’t do because it’s inconvenient.
This is why we all need to be skeptical about Meta’s eventual arrival into the Fediverse.
@atomicpoet
this and so so many other reasons.