Who is "them"? The newcomers or the talk pages? The sentence is unclear, and even if it’s obvious you mean the former, not the latter, it might be especially confusing, ironically, to newcomers.
On the other hand, the sheer statement that talk pages block newcomers is assumed, which is yet another data point showcasing the insidious gaslighting this whole matter is being pushed to the public with. (Cp. wikt:wife-beating question.)
One of the basic assumptions of this project, that changing nothing is not an option, shows its true nature (makework for WMF code darlings) and the paradoxical inability/unwillingness of the the powers in charge to embrace the fundamentally novel nature of wiki work wanting to force us to a webforum / comments section ethos, disguised in snazzy, flashy bells and whistles to hide what is nothing more than a unsuitable 1990s concept.