Trying to Understand Why People Fear A Correction?

I want to understand, CAPEX is propping up the market right? More Capex spending results in more debt issuance. When more debt is issued it quite literally results in more pressure on the bond market. Theres no healthy scenario CAPEX spending continues to accelerate in this way before the bond yields increase to a point to where issuing more debt becomes economically disadvantageous. So unless AI spending results in an immediate return on investment. It will probably be healthy for the spending