I completely agree with you about the serious problem of the exclusion from the scientific debate, mainly carried out through arXiv, of non-academic physicists who could in any case enrich the scientific debate.
In my essay "The Name of the arXiv: when too much zeal is an obstacle to science" I denounce similar problems, in particular related to the obscure policies of arXiv, proposing that at least arXiv should admit papers published in peer-reviewed journals and respects the classification given by the journals.