I see it a lot too, and it's called the Nirvana fallacy [1]. We shouldn't do anything about tax evasion because people will evade taxes anyway (ignoring that you reduce the total amount of tax evasion). We shouldn't ban drunk driving because people will drive drunk anyway (ignoring that you reduce the total number of drunk drivers). We shouldn't trust non-profits, because they seek revenue anyway (ignoring that it's much less severe for any non-profit in comparison to a for-profit company).
[1] https://en.wikipedia.org/wiki/Nirvana_fallacy