I do not think that you necessarily need to infer that

I don't understand "I do not think that you necessarily need to infer that" - Why not? Is such inferring harmful?

Context:

One notable exception to the abstinence only refrain of the family-values groups is Focus on the Family. Reginald Finger, a public health physician and the medical issue analyst for the organization , serves on the CDC's Advisory Committee for Immunization Practices. 'If three doses of HPV vaccine is going to produce efficacy over a young-adult lifetime, then [age 12] might be a good time to reach them, just because they're easier to reach and you can implement a system for doing that with the adolescent visit,' he says. 'I do not think that you necessarily need to infer that if you're giving it to 12 year olds, that 12 year olds are suspected to be at risk right then.' HPV, he notes, can be a long-lasting infection, to the point that it may be a risk even to people who have been abstinent until marriage. 'With HPV, you could have a person in their 20s, never sexually active before marriage, marrying someone who has had a sexual history in their teens, who has turned around their lifestyle and had been abstinent for eight years,' he says. 'Then all of a sudden, you have a situation where it's possible HPV could be an issue.'

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