No, the potential harm comes from follow-up tests. That's why screening strategies are designed by professionals. It's a pretty complex field, and all the people here fielding their opinions on how we should proceed about tests don't have a single idea about the implications of their theories.
What a ridiculous statement to make. No wonder the US is in the state it is in. Lets let the ignorant and uninformed decide on policy rather than the scientific community and experts. What could possibly go wrong?
Honestly, you don't have access to the necessary data to make rational decisions. That's not gatekeeping, it's logic. I don't have access to it either, although I'm indeed a healthcare pro. Screening strategies are a hyperspecialized domain and only experts somewhat understand what they're doing. It's just like making theories about what the CERN guys should be doing while not having passed physics 101 with no access to experimental data. That's why I'm just saying: you're certainly allowed to question, but you certainly can't make up assertions either.