“Are you saying that ribosomes are not made out of proteins?”
No. Not sure why you would think that.
I’m saying ribosomal proteins are not the catalytic component of a ribosome.
rRNA carries out the peptidyl transferase activity and that the ribosomal proteins are not necessary for the reaction.
I’m pointing out there is not a chicken and egg problem.
I think the author was making the point that ribosomes are constructed of proteins.
Therefore, the obvious question - if ribosomes are the protein factory in our cells, where do (or did) the proteins that make up the ribosome organelle come from?