If anyone is initially fooled by the naming that illusion is broken very quickly after just a few seconds of looking into it so I doubt that this was an intentional act to trick people
Is it stupid? Yes, but advertising is generally geared toward human stupidity. More specifically, it's geared toward pointy-haired bosses who are being presented AWS Lambda™ who are thinking to themselves "well I heard a lot about lambdas, are these what my team meant?"