No, it's not dumb. It's merely suboptimal along the one metric you've chosen to measure. I'm including "show of good will" as a secondary metric, hence why it's perfectly sensible to donate in both forms.
It's not clear techies actually donate checks, however.
"as wealth increases, people become more insulated, less likely to engage with others, and less sensitive to the suffering of others."
[1] http://www.cnbc.com/id/48725147 [2] http://philanthropy.com/article/Rich-Enclaves-Are-Not-as/133...