Strong encryption is good for the police
Law enforcement needs strong, uncompromised encryption. Look what a success it was when they managed to infiltrate Encrochat. Criminal networks only used Encrochat because it was believed to be unbreakable. If it was known that there were weaknesses and backdoors they would have used something else. Or at least they wouldn't have talked so freely on it. When law enforcement infiltrated, it wasn't because of weaknesses or backdoors, they used other classic means, which I'm sure was much harder, riskier work, but it paid off for them bigly.