If you look at the actual data ( https://s29.q4cdn.com/435878511/files/doc_presentations/2023... ), 0.6% with the vaccine had a grade 3 fever, compared to 0.4% of placebo.

The population in question is 60+ or 70+. RSV can be very significant in that population, even in young kids, it is a virus that shuts down schools. The author is a well known anti-vax guy, so I’d assume he’s presenting the most negative scenario possible.