Because the reporting was pretty over the top.
That being said, the ability of a company to come and essentially take over an open source project is fairly disturbing. Just the name alone is worth a lot and any fork will have an uphill battle to gain that name recognition.
As for Muse Groups intentions, they seem pretty suspect to me. A suspicion that is not helped by BeauHD comparing it to the IP address collection of a web server because a server needs the IP to serve the page, Audacity does not. Or by them saying "This is an effort to avoid the added complexity and expense of dealing with laws regulating collection of personal data from children. ". If they did say that, and the summary is unclear to me whether they did or not, then they are going to run into trouble since they know Audacity is used by a lot of children.
Either this is fully opt in (like syncthing, etc...) or I will opt out of using it. If it had been like this from the start I would probably not have cared but I don't like it when new people take over change the rules in a way that doesn't suit me and I certainly don't want to be in a situation where, having partially decided to use an OS based on it's lack of telemetry, I am now having to go through the applications one by one to opt out of it.