Again, we have to put things into perspective. Maybe the client is a WordPress user and knows that a simple plugin can solve the problem for the time being. And maybe they aren't a WordPress user, but a simple plugin does cover the use case.
I agree about the existence of such clients, and I personally make a run when I smell bullshit on the table, but the point here is not the ethics of clients but making the right decision.
Yes, sometimes static site generators make sense, but you have to be sane about your decision making.
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