I have a very short instagram handle that I've never used. People are constantly trying to take it over. I get the email "we've made it easy to get back on Instagram" sometimes hundreds of times per hour . I don't think they have any kind of rate limiting or account abuse protections. It's also true that you can disable Instagram 2FA without 2FA via various Facebook apps, which is ridiculous.
I know for me personally, if I was getting hounded by emails, I'd definitely look into getting rid of it somehow.