Spot on Chris. My fishing is still reasonably good...but it is depressing to know that it is only a matter of time until that is no longer so. I also agree that it is pointless arguing amongst ourselves...that is just a way for us older guys to vent our spleen, display our anger over the worsening situation.
I can look back to the way our rivers were when I started fishing over sixty years ago....and the rivers then were a joy to behold, and to fish. They bare NO relationship now to the way they were then. Ok, I live in a privileged area in that sense...there were areas, in the industrialised heartlands for instance, where the rivers were infinitely worse at that time...but I am talking about the average, not those exceptional areas. They SAY that rivers are cleaner now...but that seems to me to be a rather debatable point. Some rivers LOOK cleaner now...but at the same time, some of those apparently 'clean' rivers are relatively lifeless. I recall small local rivers and streams that were absolutely teeming with life of every description when I was young, the natural pyramid of life, from healthy algae such as ranunculus, to the tiniest invertebrates, and onwards up the chain to the apex predator for that particular water...were all present and thriving. Those same waters now LOOK clean...some even LOOK cleaner than they did back then....but many are practically lifeless, certainly when compared to back then.
So...what has changed? I don't know, but I have my suspicions. I suspect that there are numerous unpleasant chemicals, or cocktails of chemicals...that may well be practically invisible in solution, which were NOT around then (certainly not in significant amounts, and some not at all)...but which are there now. I think these are partly the result of the demands of modern living...but more significantly, the result of greed, of techniques developed to increase profits. It is my belief that such things have reduced the capacity of our rivers to support the full spectrum of life at the levels they once did....which is why many (if not all) cases, our rivers are mere shadows of their former selves. There will undoubtedly be some species of life, some fish etc., that are less demanding, are able to cope with less than pristine conditions. These may even thrive for a while...but overall, things are not good.
Add to that 'on the edge' situation (where many species are barely clinging on)...the crazy mix of uncontrolled, mass levels of predatory critters (some of which our rivers have never seen before)...and you have a recipe for disaster.
I may well be wrong, this may be all 'doom and gloom' nonsense....but we will see. Or rather, you youngsters will see...I am hoping my fishing remains reasonable until I am too old to worry....next week perhaps
Cheers, Dave.