Something I don't understand. What's the point of obfuscation if ultimately you can be caught when you try to convert it to fiat? If I have Btc and I convert i

Something I don't understand. What's the point of obfuscation if ultimately you can be caught when you try to convert it to fiat? If I have Btc and I convert it to monero to prevent tracking, how do I get it back to money in my bank account without being traceable?