Fulltextsearch:index/live and nextcloud cron

I’ve been using fulltextsearch indexing for a number of years, in particular with tesseract.
I followed the procedure indicated in the documentation:
/nextcloud/occ fulltextsearch:index

then a service with :
/nextcloud/occ fulltextsearch:live

But I’ve noticed that there’s also a cron job running in parallel, which enables indexing. If I stop my fulltextsearch:live, my cron seems to take over.

Why did you set up this Cron/Index? And what is the best recommended approach? Is the documentation out of date on this point?

Thank you very much and have a nice day.

Anthony