Neither of these are accurate. If by mitigation measures you mean masks, there is more evidence that mask wearing has NO positive affect on controlling COVID.
How does influenza spread? Well, currently the CDC indicates that it spreads very similarly to covid. Mostly through airborne aerosols when people sneeze, cough, talk, or even breath in close proximity to someone else. Contaminated surface transmission is also present.
How does covid spread? The same. Perhaps to a lesser extent through surfaces.
So if we avoided large gatherings of people, avoided close proximity of other people you don’t live with, and washed our hands more, that would mitigate spread of covid while also mitigating spread of influenza, right?
While I do agree that flu vaccine is only 50% effective at best, its still better than 0%. There was a push to get more people vaccinated from flu last fall because the less people who are sick or hospitalized with flu, the more room there is for people with covid.
I’m not commenting on the mask part. It goes nowhere so I’ll leave that part out.