I'm reading the 'just' in (most of) these examples a bit differently: the person making the suggestions is using the word to acknowledge that the suggested appr

I'm reading the 'just' in (most of) these examples a bit differently: the person making the suggestions is using the word to acknowledge that the suggested approach is probably a lot simpler than what the struggler was considering, but perhaps good enough (to get started). If however it turns out the suggestion is not significantly simpler than what was being considered (perhaps because what's being suggested is not as easy as it appears to the one making the suggestion), I can see how that can come across as condescending.