I agree with everyone but just to add my bit, I do think that courses, especially those with high aspirations however unfounded, tend to over do rough on a large scale and I think the problem is growing. The reasons for this unwelcome trend are I would suggest as follows:
Environmental.
Aesthetics.
A perceived need to create ‘Championship’ conditions and therefore elevation of status.
A degree of one-upmanship from rival clubs and superintendents. (We want the toughest course)
A certain amount of strategic value.
Financial, although I think this is a minor factor.
The trend is regrettable and will not benefit the game because it leads to long rounds, expensive loss of Pro V’s and lowered self esteem following another round in the high 70’s, 80’s, 90’s etc (delete as appropriate).
Having said that I know that the huge environmental benefit is very important and will help the image of the game immensely. But I would suggest courses either cut and collect their rough on a regular basis to thin it out or even better remove the nutrient rich top soil and overseed with fescue which should then stay light and wispy but will actually be of greater benefit to wildlife as it creates a more open sward that is perfect for biodiversity. Also they need to get the real long stuff out of the way of play if they can and/or leave it on one side but not both for added strategic value.
That’s my opinion and here is a nice picy of some light fescue rough where we ripped out the topsoil five years ago surrounded by the impenetrable cabbage where we didn’t.