1. Because I'm a historian by background
2. The people I named generally follow proper historical principles, preferring fact and evidence based analysis, and critical assessment of a source's credibility.
3. That approach, if followed properly, should include scepticism of and detachment both from 'alternative versions' and from 'official' versions.
4. Agreeing with that approach isn't 'deferentially deferring', it just means I prefer that approach to a less rational one.
5. In other words I'm far more likely to agree with their approach than with yours which I have decided for myself appears consistently less rigourous.
6. If I disagree with them (as I have with all three, on other subjects) I'll say
so.
7. I refer you to my post (no. 39) on page two of this thread -- largely a joke (about the CIA etc.) but a good underlying point to it which is : speculation-based CTs very often (IMO) severe to discredit, hinder and make more difficult a more professional type of investigation.
<edit to add> : perhaps I should have made my original point clearer/less rushed. In quite a few long and involved CT threads, the scepticism of the three posters I named conforms much more closely to historical principles and to rationality, facts and evidence.
That approach, to me, contrasts creditably with the prevailing unquestioning credulity/gullibility of so many CT fans towards any and every sensational-sounding, 'exclusive revealing of the exclusive, covered up truth' type-CT.
That's why I want common-sensiblists like them (I should have said 'for example) to give an implausible looking 'theory' the time of day before I take much notice of it.