What if you wanted to buy a $25,000 car in cash from a dealership? That's not intentionally avoiding taxes. It's trying to get a better deal.
It's not unreasonable to want to avoid keeping a lot of money in a checking account in the US. They offer 0% interest rates. It doesn't make sense to have large sums of money sitting there. Why let the bank profit off your money if they aren't going to return some of it back to you for letting them use your money to make them more money.