A permanent, predictable bike lane doesn’t impact traffic nearly as much as random cars parked on the street (everyone in the lane has to move over), but these people never complain about too much street parking.
If it’s part of a system, I suppose that’s fine. A better alternative could be expanding the sidewalk and providing patio space for restaurants etc. But if the plan is “we paint white lines and put up parking meters and it will slow people down”, then f that. It’ll just cause accidents and reinforces the area as a driving destination.
I think their claim is that bike lanes mean that you’re permanently blocking that parking lane off so you can’t have 2 lanes instead of 1, or forgetting that the second lane is normally parking spaces. I think my favorite bit of all of this is all the videos of bike lanes without stop and go bikes where drivers record and say “no one’s using them!”