Memes

It does follow. If you have the numbers and willingness to show up it is obvious that you have to be taken seriously.

PSL, for example, is taken seriously more by showing up and protesting every time the US Empire does something vile. They have growing numbers because they don't treat elections as the primary vehicle for change, but more as advertisement, and instead focus on unionizing, protest, and striking. Showing up at the ballot once every 2-4 years is far less effective than organizing political education, protests, and organizing efforts year-round. This is strength, being able to organize a protest in less than 24 hours and have people on the streets shows enormous strength in logistics and discipline.

Means you are going to no show and as such will never been taken seriously.

Incorrect. To the contrary, the point Marxists actually oppose, that being showing up to elections only and treating it as the primary vehicle for change, is to doom us. Again, nobody is arguing that if someone casts a vote they are hurting the movement, just that they are basically wasting their time, especially in the US Empire where most states are solidly for one of two bourgeois parties.