You say it's not a good argument but you don't say why. I think it's appropriate, insofar as it's the very government that's made these things safer, improved the lives of their citizens by getting involved.

The exact same mechanisms are available to fight both car deaths and malicious actors. Why do we trust the government to do one but not the other?

(Keep in mind I'm NOT in favor of backdooring crypto, I just don't think "but the government is corrupt" is a good argument against it)