I would categorize this as "selective personal experience to prove a point". There's a thread going right now started by someone who was interdicted 5 times on the way to a station. If you're trying to do something in a system and another group is opposing you, in Open, there's a much greater risk they will actively try to stop you. By using Solo and PGs, you simply deny them the opportunity to do so.
There's no point in arguing this. It's objective fact. If you don't care, that's fine, but don't pretend this isn't a thing here in Elite.
Way back in 2014 when FDEV first explained block and how it would work they gave chain interdiction as an example of when to use it.