There's confusion of terms here. You seem to be using "EULA" to mean "contract". If you look at the FAQ Confluent added, they read "EULA" to mean something more specific.
"End User License Agreement" has no reliable, specific meaning in the industry. "EULA" for short gets thrown away even more willy-nilly, in all kinds of circumstances. I've seen it used for SaaS terms.
You're certainly right that "EULA" is ambiguous -- but Bryan provided a more specific definition which was pretty clearly concerned with the "contract law in addition to copyright law" part:
> EULAs are an attempt to get out of copyright law — where the copyright owner is quite limited in the rights afforded to them as to how the content is consumed — and into contract law, where there are many fewer such limits. And EULAs have accordingly historically restricted (or tried to restrict) all sorts of uses like benchmarking, reverse engineering, running with competitive products (or, say, being used by a competitor to make competitive products), and so on.
"End User License Agreement" has no reliable, specific meaning in the industry. "EULA" for short gets thrown away even more willy-nilly, in all kinds of circumstances. I've seen it used for SaaS terms.