Agree with J4MIE. Poor form from just about everyone involved.

The (split-second) decision to floor it was stupid, not an indicator of his superior winning attitude.

Had he stopped he would get notional time as has been common for many years and he knows it.

This way he seemingly also caused the later issue on the final stage. Worst case there could have been something else inside the arch or behind it, either a fan(blower) to keep it up (as there often is in similar constructions) or a fan (person) trying to move it. Even if it "just" got stuck on his windscreen it would get dangerous quite quickly.