Our current system predominantly favors white, rich, cis-gendered male christians who are good at manipulating their constituents and getting rich people and corporations to give them money. This seems like such an awful set of criteria that it is hard to see how just picking randomly could fail to be better. (There is evidence that sometimes it is better to choose randomly than relying on ineffective criteria: https://www.theguardian.com/lifeandstyle/2014/oct/10/random-...)

Even if you eliminate the problems of campaign finance and winner-takes-all in elections we are still left with the distorting incentives of re-election (though enforced single terms could help with that.)

State representatives that want to be successfully re-elected, need to bring home the pork and this incentives wasteful government spending. They also need to avoid taking political stances that might cost them the election, even when it has popular support and would be beneficial to our society (e.g. gun laws, criminal reform and the legalization of marijuana).

Removing perverse incentives of re-election and moving to random selection for one of our chambers of representatives would mean less pointless pork barrel spending, reduce the incentives for corruption, and lead to a more representative demographic sampling with a better personal understanding of the economic and social challenges we face as a society.