You're speaking with great confidence. In the medium-long term I agree, but my lived experience says you're wrong in the here and now -- we, for example, are still hiring juniors.
You're right, I'm thinking about the future. We're still in the window where the tools aren't really ready.
If you need to get shit done right now you have to mostly do things the old way with similar headcount. I assert though that on the margins the market is already shrinking - if for no other reason than employers with longer time horizons are looking to target future employment levels.