Look at this from the Digital Sovereignty angle.

AFAU Let's Encrypt gets its money from Google. There are other minor providers of similar services over the ACME protocol, but this does not change the fact that they issue the the majority of the free TLS certificates.

We already had one centralized domain name system managed by the US Government that we have to hop through before publishing our content online for everyone.

Now, we silently and tacitly added another US-based one.