I think you're right -- most students majoring in hard sciences would be hard-pressed to get the same level of education outside of a traditional lab setting.
I'm thinking more about the large portion of students taking a first year science course (be it Chemistry, Biology, or Physics) simply because they have a degree requirement of "1 year of science". If we think about the reasons why a university would require a student to take a science course without regard to which course they take, I would assert that the point lies in helping students to gain an understanding of general scientific methodology and learn to apply and connect theory to real-world practice.
Given that, I'd question the entire idea of requiring those students to pick a particular branch of science to focus on. A solid "science overview" lab curriculum online might be better suited to teaching basic principles to non-science majors with relatively inexpensive materials and equipment than a traditional lab designed more for teaching chemists or physicists the building blocks for more advanced work in their field.