Well I'm not the guy who claimed that however:

• they were wrong about the mRNA staying at the injection site, they are probably wrong about the mRNA lasting only a few days. VAERS suggests it can last a month
• if they are correct that the flu has all but disappeared, when it does reappear, since normally we get exposed in a sort of rolling manner, we will all get exposed at once and we will all have fewer flu antibodies when we do
• if they are incorrect and the flu is still around, then covid is not nearly as virulent/dangerous as they propagandize, therefore you should not vaccinate since it is: no benefit, some risk