If every single gun rights group disappeared tomorrow, 2A advocacy would still continue.
We exist as amplifiers and loudspeakers. We represent people and help activate them. The desire for freedom existed long before we did, and it would likely continue if we were gone.
If Michael Bloomberg disappeared tomorrow, anti-2A lobbying as it exists today would functionally stop.
Here's the key excerpt in video. The same applies to much of Bloomberg's gun control.
No one was clamoring for a Glock ban, for example. But he demanded it through Everytown, and several blue state politicians jumped on command.