Tax Avoidance is perfectly legal and encouraged by the IRS. There are many exemptions and credits for anyone who is eligible to take advantage of. If you’ve ever seen “whichever is lower” on a tax preparation form, that’s an example of avoidance. Why pay more when the law says you don’t have to?
Tax Evasion is the illegal activity of not paying taxes you were supposed to pay. This is where fraud comes into play. People should absolutely be prosecuted for evasion, but they should not shamed for avoidance.