Thanks for noting!
Referring back to the recent posts in the nested replies topic, and your keen observation:
I share the same concern that @ToddZ noted: the button labeled simply Reply needs to be more specific.
Some users may assume that Reply to Topic is just a rephrasing of Reply, rather than understanding that the two actions are different.
As a moderator, I gave up years ago trying to fix cases where a user clicked the wrong reply button. With nested replies, I can see that same workload returning again.