If it must be unlearned, why is it taught?
Learning complex subjects is iterative. No one can grasp the latest and most complete version of a scientific theory in a few days of high school. You learn simplified versions, then progressively more complex versions. If you make a creer in any field of science you will eventuall reach a point where experts disagree with each other. These disagreements will often be at a level that can't even be understood by non-professionals.
Being realistic, the thing in biologists that is being protested is common descent. Since DNA sequencing became available, common descent is as certain as anything in science. The lab work and theoretical underpinnings are identical to those used in court to identify people and confirm parentage.