That's a gross over-simplification. I'd wager that you're correct that the majority are scammy in nature since it's so simple to create a nonprofit. But, there are thousands of important nonprofits out there doing good work. In my experience, the people that choose to mostly work with nonprofits are working with important organizations doing good work. That's anecdotal, but it just seems pointlessly dismissive to lump nonprofits together as bad simply because they're nonprofits.

Why not assume that this person's job does some very basic due diligence to confirm they're working with an authentic organization that's doing good, rather than trying to "bust ur dream".