To truly think critically you must free yourself from ideology as best you can.
The demarcation between the humanities and social sciences and the so-called hard(er) sciences is not a division of technicality. To say that you can split the degrees awarded by our academic institutions into technical versus non-technical and then claim that the more technical are freer of ideology is a supremely ideological statement.
Also, you've managed to conflate not two but three distinct ideas in order to make the claim that you've made: for the purposes of this conversation subjective judgements come in two flavo(u)rs - the first is where you evaluate according to some standard, the second is where you impose your values. It is only the second of these that can be in any way said to be ideological and only then it is only when you become identified with the values you are imposing on the world which happens rarely - and get this, people in technical degrees do this all the time.