What a load of uninformed rubbish.
Increasing the seat pitch in the Lower Centenary would mean removing every single seat, replacing the existing concrete 'step' structure and the cost would be astronomically prohibitive and would reduce capacity to uneconomical levels.
The Centenary Stand is now coming up to 20 years old and even the upper stand only has 660mm pitched seats (source Football Grounds of Britain - Simon Inglis). The Lower stand was built in 1963 and the 1995 refurbishment added very little to customer space and comfort - the seat pitch is amongst the smallest in the Football League (same source).
Basically, even the Centenary Stand is at best 20 years old and at worst a slightly refurbished 50 year old structure.
And less of the fat arse! - my problem is the 34" inside leg.
The informed opinion on the subject is that the population is not necessarily getting taller but that that it is getting bigger. The regulations have been adjusted to suit. If you would like to be similarly informed you need only read the research which is conveniently condensed into the latest Guide to Safety in Sports Grounds (the ‘Green Book’).
The legroom can be increased without structural alteration, exorbitant costs or indeed without making up for loss of capacity elsewhere. Just because you can’t think of how to do it, does not mean it can’t be done. Rest assured it’s been done elsewhere.
The relevant dimension is from your arse to your knee - not an inside leg, not your height and not from any other bone to anywhere else. The recommended dimension has been raised from 600mm to 700mm in the last decade. If this was entirely down to height this would infer an increase in average height of approximately 250mm or roughly 10 inches in height (the distance from your knee to your backside is about 40% of your height). No, not really. Oh, and 34" is about 865mm. Exactly how short are your shins?
The day I post uninformed rubbish on this or any other site, I’ll show my fat arse in Lewis’s window (if it still had one).
BTW Simon Inglis is also very good on what makes Anfield so great and lists many aspects of the traditional ‘packed’ football ground. He does not venture to offer any view on the structural integrity of any part of the ground - no matter how young or old it is.