I did not mean you should use your unique mechanic and implement it in a tower defense game.
I suggested you should start creating a smaller game first. Right now, you seem to have zero game development experience. It is that saying that one should learn to walk first, before running. There are jams that have ai games as a topic. Maybe try joining one of those. This is Itch after all.
A tower defense game came to mind, because it shares a few things with rts, on the mechanical side. In one of the simplest versions, you have something like Plants vs. Zombies. But you can go arbitrarily close to a real time strategy base builder game, where you have workers building towers and could spawn your own army to capture the enemy base.
My concept revolves around motion, strategy, and positioning to get to appreciate the special effects to their fullest.
Uhm. You sure you are not reinventing a complicated type of tower defense game, but for multiplayer? There are loads and loads of different mechanics seen in tower defense games.
https://duckduckgo.com/?q=Desktop+Tower+Defense&ia=web https://duckduckgo.com/?q=whiteboard+tower+defense&ia=web These had you build the paths by placing your towers.
Anyway, you sould split the problem project into smaller steps. And one of those steps is to verify that you can actually build a game with the intended method.
And if you are confident there, you should tackle again the issue of new engine versus modification of an existing engine. The problem with rts game is, that they are multiplayer. And multiplayer is a nightmare for development. Big companies often can't get it right and I have seen it happen that they scratched multiplayer features for release, because they just could not get it to work reliably.
Bringing a new mechanic into an existing framework sounds orders of magnitude less work than building such a framework from sratch. That advice that the ai bot gave is highly questionable. Building a rts is years of work for multiple people, but the ai is confident it could do it in months with supervision by an amateur developer...