How much has it improved? Where has it improved? If the internet were not there, would that improvement not have happened? Modern medicine definitely existed well before the internet, so the internet wasn't necessary for that to exist.
Just look at how treatment during a pandemic was communicated and evolved in realtime, the whole way we do science today interacts with learning from many people in a much faster and more efficient way.
Luckily these sort of nonsense one or the other positions don’t work in the real world. Clearly it would be much easier to recreate modern medicine with the Internet available than it would be to recreate the Internet if we just had medicine.
Faster, yes, more efficient - not sure and very difficult to measure. We also got a lot more diversity and resistance to measures.
I find the view that recreating modern medicine being clearly easy with the internet dubious. Even more, we did create the internet while having medicine before, not the other way around. Without modern medicine we might not have any internet to start with as the struggle with human diseases and illness might have led to very different time attribution of efforts.
Also, the quote is for all of medicine, not just modern.