@Jim ******
I’m not trying to contradict your view, but the e-visa portal is fairly standardised, and I had to enter a travel plan when I applied for a 90 day Non O visa for a friend just a couple of weeks ago. I also had to do the same when I applied for my own visa last year.
It is purely a technical formality. No tickets are uploaded, and you are anyway free to travel at any time within 90 days frame from the date the visa is issued.