I suspect a lot of those lies are not quite as flat as JM has made them out to be, although I'll admit I haven't watched any of the tourney today. A lot of flat lies are not quite as flat as we think. The human eye doesn't really notice the difference between 0 and a 2-3% grade, however water certainly does, notice the difference, that is. When we get on our soapbox and preach our minimalist philosophies it seems hypocritical to denounce altering something in the name of avoiding flat lies. We take what the land has to offer, right?. Flat is better than overly steep, this much I'd like to think we can agree on. Certainly a flat lie is more suitable to golf than that of some ridiculously steep slope, correct?
I wonder what are the options? We can get out the dozer and create some catch basins. Something like the following, with x representing the bottom of the basin......
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x x x x
x x x x
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This sort of design would promote water flow and create varying stances, but it sure would look artificial. Regardless of how you proposed to alter things,(where to place your x's) there is always going to be the issue of time and money spent. Is it best to be changing something that to some degree is playable as it is? I venture to say a lot of times it is not. But, of course, that's just my two cents.