There are many studies which show that surgical masks are quite good at stopping a majority of expelled particles, even those well within the aerosolized size regime:

Surgical masks reduce outward aerosol-sized particles by at least 74%: https://www.nature.com/articles/s41598-020-72798-7

Surgical masks reduce outward COVID viral transmission by 73%, and viral RNA by 58%: https://journals.asm.org/doi/10.1128/msphere.00637-20

Outward filtering efficiency above 50% is certainly worth it compared to the cost of a surgeon wearing a mask. It's arguably worth it even at much lower efficiencies.

If you read my comment, you'll notice I'm not disagreeing on the aerosol/droplet size boundary. I'm arguing against the apparent subtext of your comment, which seems to indicate that surgical masks aren't effective at protecting patients.