Because public voting is the status quo, so 3 & 4 are identical in what they would (not) change in the procedures. 3 is just an additional statement of support. If you support public voting (3) you also support 4 over 1/2.
I do think ranked choice voting is dumb and adds low value and high complexity. This thread with hundreds of comments affirms that notion.
To me, Debian Developer feels more like a position of responsibility and representation than a member of the public. But I'm not one, and I don't know what the expectations are.