Let's say an NGO has done the work to formally specify a software product that would improve outcomes or people reached by I dunno 30%. They send out RFPs to a number of consultancies who provide a quote and guaranteed delivery meeting their specifications by the desired date. Only one fits in the budget, and by quite a margin. It's a consultancy that openly "vibe codes".

Should they hire them?

Yes the specification is holding a lot of weight here. Assume it's comprehensive and all consultancies offer the same aftercare support. Otherwise we're just handwaving and bike shedding over something that's not measurable.