Leaving germany and coming back for another 90 days as NZ citizen

I am a NZ citizen and am a little confused by the wording on this page –

[https://wellington.diplo.de/nz-en/service/-/1677534](https://wellington.diplo.de/nz-en/service/-/1677534)

Specifically –

According to this bilateral agreement the duration of one stay in Germany must not exceed 90 days but the number of entries to Germany is not limited. In order to re-enter Germany for another 90 days, visitors have to depart Germany for any other non-Schengen country and can come back on the same day. Since visitors need to be able to document the period of time they have been spending in Germany, we recommend to enter and to depart via a German airport in order to obtain an official entry and departure stamp in their passport. However your total must not exceed one year.

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It seems to say pretty plainly that I can just leave and come back for another 90 days…however it doesn’t seem like it should be so simple??

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Anyone tried this before?