The way I read it, the developer wanted opt-out but it’s likely it will be opt-in. I’m find with opt-in and vehemently against opt-out for telemetry.
I would prefer the information was statistical only. Rather than hostname (making the assumption they only want hostname to be able to somehow separate the data to follow changes over time), a much better idea would be some kind of hash based on information unlikely to change, but enough information that it would be unlikely possible to brute-force the original data out of the hash. So all they know is, this data came from the same machine, but cannot ID the machine. Maybe some kind of unique but otherwise untrackable unique ID is created at install time and ONLY used for this purpose and no other.
The US did in 2016 too. It’s just for some reason, a lot of you want to do it all over again :P