It's a little bit different, you're comparing two different things. One is the physical connection, the other is a media type. You can have a floppy that connects through USB, still a fully supported physical connection. Same with a ZIP disk.Weird to drop it...I'm guessing it's an oversight or a bug, but who knows. Funny that macOS still supports floppy drives and zip disks, but would drop this.
I never used Firewire. I had a 4th gen iPod, but it had USB and I always used that.
If they remove the support for physical FireWire connections, that doesn't change anything for anyone using adapters to connect their FireWire devices to a Mac. And since no Mac has had a physical FireWire port in almost 15 years, that would be pretty much everyone.
Think about it... No Mac with a FireWire port comes even close to running Tahoe. So if you are using a new Mac, and you're using an adapter, by the time Tahoe "sees" the device, it is seeing a USB or Thunderbolt device because of the adapter, it isn't seeing a FireWire device.
And if you've hung onto an old Mac to use a FireWire device, well, you won't be installing Tahoe on that ancient computer ANYway.
So everyone going crazy about Apple removing FireWire support for no reason really needs to just calm down. Find a cause more worthwhile for your outrage.