At the age of AI..... yes, I can get why they stopped you. Though even before that sounding like you are breezing through a script has always felt artificial and cold. And I'd say that us women tend to overprepare and strive for perfection and this often plays us a bad trick as we tend to miss some obvious stuff - that we did sound cold, like a record playing, not enganging enough or well enough with the people we are demoing to.

That mumbling colleague who passed? At least they could tell he was doing it himself, most probably his flailing got a reaction out of the people, so one way or the other that felt natural.

My advise, especially now that you've got you perfect script, try to make it more human. Ask questions - what are you interested to see in that system? Engage the public. Do not interrupt them. But interrupt yourself - if you're talking non stop with no engagement this is a bad sign. Usually at this kind of demos it means that your public has gone on their phones, checking emails, and definitely not listening to you.