Should I YOLO into flash loan arbitrage on L2?

Hey folks, I’m new to Web3 and smart contracts but have a solid IT background (not in Web3).
I heard about flash loan arbitrage on L2s for cheaper gas fees, sounds too good, right?

Thinking of building my own bot (Python or Golang) + Solidity smart contract.
But before I go full degen, is this still profitable as a small passive income, or just MEV bots eating everyone alive?

For example, with a $5K trade flash loan, 0.3% price difference, 0.09% flash loan fee, and $0.05 gas per trade (L2), I’d net $20.45 per winning trade. With a 40% win rate (8 wins/20 trades), my final daily profit would be ~$50

Sounds great on paper but in the real world the slippage, failed transactions, and competition, can I actually cover all fees and still make even e.g. $10/day consistently?
Or is this just an expensive way to donate gas fees?