We’ve had “legitimate” for-profit firms supplying authoritarian governments with phone malware that they allegedly used to spy on and sometimes murder their dissidents. The slippery slope isn’t a fallacy, we’ve seen what happens if it isn’t guarded.

That's technically true, but I was using it to prove my point that there's more to think about than company profits.

Maybe I should have used dumping waste in a river and paying workers below minimum wage as examples. Profits could go up, but most people would agree it should still be illegal.