The other thing that people overlook is that the actual process of research - the painstaking summarising and copy-pasting and grouping and regrouping and generating insights and comparing them back with the source quotes - has a spaced repetition effect on the researcher.

You don't just review your interview notes, you learn them by heart.

You can quote users, verbatim, off the top of your head because you were so deep in the weeds.

The most effective approach is to do the preliminary analysis yourself and then have the product team go through it with you, grouping and drawing their own insights and comparing them to yours - in the process, instilling and distilling those verbatim quotes into the product manager's mind.

Asking AI to generate a few quick bullet points leaves the team no better off in terms of deeply understanding their customers.

Basically, if they cheat, they'll never learn.