It only takes a couple of seconds to acquire a certificate. Not long enough for people to raise support requests.
Our work with Let's Encrypt demonstrated the feasibility of validating domains from multiple vantage points on the Internet: https://www.usenix.org/conference/usenixsecurity21/presentat...
We hope and advocate for universal adoption of this approach via the CA/Browser forum (since the internet is only as strong as its weakest link).