Recently, there have been incidents of cross-chain bridges being hacked and oracle errors.

Everyone's first reaction is "wait for confirmation"...
Honestly, this is basically dealing with who packs transactions into blocks, who queues, and who can bundle a bunch of transactions to race ahead.

I think retail investors just need to understand this: your transaction isn't "submitted and done,"
In the middle, builders/searchers will look at it as material—whether it can be front-run, whether it will be pushed to the back, or even bundled together—these are not fully under your control.
So don't blindly trust "my speed is fast," more practically: avoid chasing large amounts during peak congestion, use limit orders instead of market orders when possible, and for cross-chain or new oracle price feeds, wait a few more blocks.

What I fear most isn't losing money, but losing control—if I lose money, I can still review what happened; losing control means not even knowing who you're competing against.
Let's start with this, gradually understanding the boundaries of risk.