“There weren’t enough of us to sway the election” and “had more people worked with us we would have one”
"Had more people agreed with us, we would have had more people who agreed with us" is not anything but a statement of obvious, if wishful, fact, and is not what is being said; not in my summary nor in the arguments of the people I'm referring to. Nor does it make any sense as an argument, explanation, or point of any kind. Utterly vacuous.
The argument being put forth, and I suspect you're well-aware of this, is that if the Dems had taken up whatever position these protest-voters wanted, that would have convinced enough people to vote Dem who otherwise would not have done so.