Many people who deliberately choose open source, are also into privacy. I'm not sure what people like. But you'll definitely face some rejection by people like me. I like to file bugreports myself. I get my apps from F-Droid and they usually strip those telemetry libraries from the source. But for people who use Obtanium or Google Play, it'll work. I think there is a good share of users who are fine with crashreports. Maybe the majority. You could make the app ask for confirmation before sending the report. Or offer two variants of the app, one normal and one without. Or let people like F-Droid offer the latter.

If it's more than crash reports, I think it should be opt-in rather than opt-out.

I like the old fashioned way of doing free software. Have a community around the project, a bugtracker and engage people in a discussion about future developments. I'm happy if that's baked into an app if it's opt-in and it's an open backend or something simple, meaning you don't include the whole Firebase, Crashlytics, ... stuff. But it's up to the developer. If you like it, and your audience isn't privacy nerds, include it and see if people complain.