> If no one hires junior developers then how will we make new developers?

Independent of the serious answer given by BurningFrog, it's also useful to understand that what's best for the world at large is not necessarily best for your company.

The suggestion was to not hire junior for certain projects, where that makes sense.

This does not at all imply that no one should ever hire them. So get up from that slippery slope and start walking again!