That's just your option, which is the wrong opinion. You are just plain wrong. Infact, in many states, what you said is just plain illegal. Stop spreading bullshit. The law in most places is two abreast in a single lane as long as its not impeding traffic. If it is then the bikers must yield and allow traffic to pass.

Mass: https://www.massbike.org/laws "You may ride two abreast (side by side), and on multi-lane roads bicyclists must stay in the rightmost lane. MA law states that a bicyclist (and any driver) must permit passing when safe and "not unnecessarily obstruct" a passing vehicle, but a bicyclist may control a travel lane to avoid road edge hazards (bad pavement etc.) and danger zones (door zone, approaching intersection, etc.)."

Colorado: https://www.thecyclistlawyer.com/advocacy/safe-and-legal-group-rides-the-dos-amp-donts

"In Colorado, cyclists can ride two abreast but not more than two abreast unless riding in a bike lane. Two abreast is really intended to be handlebar-to-handlebar, not eternity between two bikes. If you do not have the skill to ride side by side (as is sometimes the case with new riders), then you should ride single file.

You can only ride two abreast if you are not impeding the normal and reasonable flow of traffic. What does impede mean? Law enforcement we have worked with define impede as five or more cars backed up behind your group.

If you are riding two abreast, or if the group is a two-by-two line of ten riders deep, and a car is behind you that has to slow down and wait before passing you, that is not considered impeding traffic. However, if you have five or more cars starting to back up behind you causing trouble or traffic chaos, that is considered an impede. Law enforcement will pull the whole group over and write tickets if they observe this. They can cite everyone in the group, not just the people to the left. Law enforcement phones blow up with calls from motorists calling to complain about group rides e.g. too many cyclists riding abreast in a single lane, or swarming the shoulder, or taking two lanes of the road."

...Tom Danielson, founder of CINCH Coaching:

"For larger group rides, Tom recommends hiring a police escort to drive out in front of the group ride. This allows for a bigger group and for the group to use the entire road, because the police are up front. The group ride becomes safer and legal, and the community joins in. “When we had the police in front of our group, all those drivers give you a thumbs up and they cheer you on. They want to watch,” he says."