3 different opinions amalgamated as 1 logical conclusion.

1 : your university course had a perspective another field of study contradicted (according to you and your teachers then)

2 : because of that one of those fields, the "new" one according to your learning process, can't be taken seriously

3 : consequently any author from that field can not be taken seriously

No, assuming your recall of the situation is correct it just means you had teachers who didn't care and relied on shitty textbooks, nothing deeper about entire fields.