The first sentence applies equally to a 42 summit round - the fact that the second sentence doesn't apply means each round is comparable with every other.
If the choice of tops and starting points for 42+ rounds becomes a matter for each individual then it all becomes a bit meaningless - there are easily another 13 top on or very close to the 42 top route that can be added with very little effort.
If the tops don't matter why bother waiting until 50, 55 or 60 to attempt such rounds, why not attempt them much earlier when age will have less of an influence?
If more recent 50@50 rounds were more difficult than the original this wouldn't be an issue but they aren't, some are barely more demanding than the accepted 42 summit round and that was never the original intention. I am not trying to take anything away from those who have completed a 50@50 other than the implied comparison with the early 50@50 rounds.