No kidding! Sounds like something my dad must’ve done.
I have the same gearing. 53-39 in the front. My back tire has an 11-28 in the back, but my Kickr core came with a 11-25 that I used until the end of 2023 when I got the Move and switched it to the 30-12 I have now.
I still can’t climb AdZ more than once with that gearing. I did it once with the 11-25 while on the 25 gear and kept a cadence of around 40-60rpms most of the way. 
I can’t imagine being able to use the 23 or 21 cog, much less the 19! 
