I became more hands on as time went by. One of the things Victoria Roberts (Vet and some) stresses is the importance of being able to handle a bird. Many other keepers that I've known also rank highly being able to examine the bird in daylight and in order to do this one needs to be able to catch it.
This doesn't mean one has to end up with a lap chicken.
Roberts has a fairly commercial approach to chicken keeping, and highlights handling for its potential to signal that a bird is under- or over- weight, which in turn may be a sign of disease, about which she was writing in the book to which I think you're referring (Diseases of free range poultry). I don't think that end justifies that means. I prefer to evaluate the health of a bird by watching it carefully going about its normal business in its normal environment, and especially in motion. From that I know which birds are eating and which are only pretending, which are bright eyed and bushy tailed and which are feeling under the weather, and so on. Of course if any are really sick or injured, then they may need a hands-on approach, and I have been able to catch them in such circumstances. You may remember the episodes with Sven and Obelix after the fox attack in 2020, or Chirk in 2023.
But in my experience most chicken health issues are ephemeral, and if noticed, are often best ignored; historically interventions by me have been, I think, neutral or detrimental to the outcome, rather than beneficial, making a trivial thing more serious, or weakening the bird through treatment for an ailment that it may or may not have had. We want to help and like to think we are, and many no doubt get satisfaction from having done *something*. But it's not clear to me from the pages of BYC that keepers are actually helping most of the time, when they intervene and treat what they think is a sick chicken, with something more or less appropriate, for what they think might be the problem. The intentions are good, but that doesn't guarantee good actions or outcomes. And in the worst cases, prolonging life is sometimes a euphemism for prolonging death.
If one intends to show a bird, then I see the need for habituating the bird to handling, and I understand how that in turn gets rated by others of the same inclination (but that doesn't include me).