Interesting, I have heard this often, that being an expert has much more to do with avoiding errors than producing brilliancies. SJ Simon said as much 70 years ago. And even at the elite level, Fred has said that most matches are decided on errors. That is true, and I'd rather much have better card play skills than bidding. I've spent time dabbling with more sophisticated bidding and that didn't work out well. Spending more time on card play has made me a better player than I was. Put it this way, most game contracts can be reached whether you're playing a super scientific system or vanilla SAYC. Would you prefer to bid the game scientifically and then go down because you missed a safety play or elimination play or would you prefer to just have 1M-2M-4M (say) and make the game? How about, consider the fact that a good portion of the time you're not bidding, but you need to defend? That can easily add up to a lot of swings.