It does. If you look at the tax brackets, https://www.irs.gov/filing/federal-income-tax-rates-and-brac... Married Filing Jointly is good for anyone where income is vastly different.

Let's say you made 150k and partner made zero. If you were filing as single, high tax bracket you would get is 24% at everything past 100k. Married filing jointly, 22% at 94k. Also, you could borrow your spouse standard deduction as well to help reduce the tax requirements.