Every person in the world should be against money laundering, because it serves no legitimate purpose and is detrimental to society because it is abused by the greedy few. We're not talking about people who want to shield where they spend their money, we're talking about criminals who use this device to clean money - stolen either through fraud, people who want to avoid paying their fair share of taxes, money raised from nefarious sales, or many other nasty things. Being able to trace illegal money swapping helps track down the crime and who benefited from it - the transparency of the blockchain actually assists in anti-money laundering by it's very nature as long as any exit points are properly regulated.
Any new trend almost always has both a positive and a negative side. The transition to digital money also has pros and cons. If we talk about money, then probably you should not focus on criminals. A person should always have the right to choose whether to use cash or a bank card with non-cash money. When using non-cash money, the criminal is more easily tracked by the government. At the same time, quite conscientious people are very easily tracked for the purpose of further manipulation. This should not be forgotten and this should be a priority. And to track the criminal, this is the business of law enforcement agencies. They have special powers for this and a certain mechanism of influence. In addition, small household transactions are still much more convenient to make in cash.