What is unique about conjugating the verbs “tener” and “hacer”?

im confused about why those two verbs are only unique

http://www.leonlingua.com/2016/07/unique-spanish-verbs/

The verbs "tener" and "hacer" are unique because they have irregular conjugations in certain forms.

Let's start with the verb "tener," which means "to have." In the present tense, "tener" follows the regular conjugation pattern for -er verbs, except in the first and second person singular forms: "yo tengo" (I have) and "tú tienes" (you have).

As for the verb "hacer," which means "to do" or "to make," it also deviates from the regular conjugation pattern in the first person singular form of the present tense: "yo hago" (I do/make). In all other forms, "hacer" follows the regular -er verb conjugation pattern.

These irregularities are specific to these two verbs only. Other verbs in Spanish, in the majority of cases, follow regular conjugation patterns based on their verb endings. However, irregular verbs like "tener" and "hacer" are actually quite common in many languages, and it is important to familiarize yourself with their specific conjugation patterns to use them correctly in sentences.