Nobody has actually given an example of “those who actually do have experience in the field”. Nobody is making that argument in good faith. Anyone “with experience in the field” of political matters is part of one or another ideological camp too, and thus either gets entirely dismissed for their bias, or worshipped for it, depending entirely upon which camp is reading the content. Unexpected outsiders to politics(which Einstein certainly was not, it’s just not historically well known to the libs) that are venerated in their fields are fundamentally more persuasive to bystanders who aren’t acting in bad-faith than the people with obvious bias.