There is a very important aspect of opposite pressure.

If DAI price ever loses peg and goes to eg 0.90 anyone with open positions immediately starts buying a shitton of them and closing their position, because they just got a 10% discount on paying off their debt, sending the peg back.

If the price ever goes to 1.10, anyone with free capital around immediately starts minting new coins and floods the market with them, because they just got an instant 10% bump on the size of minted capital, sending the peg back.