If you use an ad hominem to dismiss the conclusion of an argument out of hand then it is, indeed, a fallacy. Instead, you can make them part and parcel of your larger case.

Eugene Volokh | 6.16.2022 8:01 AM This heuristic seems similar to the ad hominem fallacy, in which a speaker asks listeners to reject certain arguments because the arguments are promoted by a ...

3. Ad Hominem. When you attack a person rather than their assertions, you are committing an ad hominem fallacy. It should be noted, however, that personal attacks aren't necessarily ad hominem ...