Most torrent sites, such as the famed Pirate Bay, advocate the use of VPN when downloading things via torrents, so it’s safe to assume that most users created fake email addresses and used IP spoofing software to remain hidden.

I don’t use a private tracker to hide my personal information. I use it because of the quality of torrents, rarely finding seedless ones and the speed with which they download.

That's kind of like seeing a story where a car crashed into someone's living room and saying "I don't see the benefit of having houses" even though:

• This is very rare
• Not all sites have equal risk of this happening
• The alternatives you would likely propose have even bigger risks.

the benefit are absolutely unrelated to privacy, use them with the idea that they're ran by cops, the point of private trackers is the quality and availability of what's in them, and most of the time, the quantity, you can find niche stuff uploaded 15 years ago with enough seed to clog your fiber