So if an engineering team is successful, then their manager is necessarily an engineering expert? You’re really not providing any rationale to support this rather extreme position. Bill Gates experience in the field of public health is choosing projects to finance, and even then he is not the primary person responsible for that in his foundation. Bill Gates has no credentials you could point to, and has done no work you could point to, that would support an assertion of him being a public health expert. It is frankly a ridiculous proposition.