Floaters are protein debris flakes literally floating in the fluid of your eyeballs. They're not neurological. They become most noticable when moving your eyes. And over time their appearance changes as they slowly migrate, often times going in and out of focus.
You're right, but not everyone can tell the difference and not everyone can describe their experiences very well. There's also the blue field entoptic phenomenon (white blood cells!), and a bunch of similar things within the eye which can look similar to "floaters".
And they're not "floaters" but look like old school TV statics. Easier to see over plain color (blue sky, night time etc.).
https://en.wikipedia.org/wiki/Visual_snow_syndrome