Taking a tip from an old tune: "It ain't necessarily so!".
Unchallenged assumptions can cause development departments to spend money unproductively, markedly increasing fund-raising costs. They can cause us to unwittingly alienate donors, reducing development revenues in ways that are difficult to detect. In short, conventional wisdoms are dangerous.
Keller
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TK
D001290:Attitude; D002608:Charities / Q000191:economics*; D003365:Costs and Cost Analysis; D006233:Persons with Disabilities; D005653:Fund Raising / Q000191:economics / Q000379:methods* / Q000592:standards; D006801:Humans; D007398:Interpersonal Relations; D009229:Mythology; D014481:United States; D014728:Veterans