Because of said $$$ bug bounty. There have been countless mitigations since launch. The biggest one for me is they nerfed (locked down) Bitcoin script for secur

Because of said $$$ bug bounty. There have been countless mitigations since launch. The biggest one for me is they nerfed (locked down) Bitcoin script for security reasons, which reduced it's utility for anything but transferring BTC. Granted, it's inability to scale would have made that true anyway, but the resulting inability to have smart contracts on Bitcoin might be one reason arguments for scaling it with bigger blocks have failed to win: if all it does is move a coin, why bother changing the block size etc when you have Lightning etc.