[Question] Why is so much discussion happening in private Google Docs?

I’ve no­ticed that when I’ve been in­vited to view and com­ment on AI-safety re­lated draft ar­ti­cles (in Google Docs), they tend to quickly at­tract a lot of ex­ten­sive dis­cus­sion, in­clud­ing from peo­ple who al­most never par­ti­ci­pate on pub­lic fo­rums like LessWrong or AI Align­ment Fo­rum. The num­ber of com­ments is of­ten an or­der of mag­ni­tude higher than a typ­i­cal post on the Align­ment Fo­rum. (Some of these are just point­ing out ty­pos and the like, but there’s still a lot of sub­stan­tial dis­cus­sions.) This seems kind of waste­ful be­cause many of the com­ments do not end up be­ing re­flected in the fi­nal doc­u­ment so the ideas and ar­gu­ments in them never end up be­ing seen by the pub­lic (e.g., be­cause the au­thor dis­agrees with them, or doesn’t want to in­clude them due to length). So I guess I have a num­ber of re­lated ques­tions:

  1. What is it about these Google Docs that makes peo­ple so will­ing to par­ti­ci­pate in dis­cussing them?

  2. Would the same level of dis­cus­sion hap­pen if the same draft au­thors were to pre­sent their drafts for dis­cus­sion in pub­lic?

  3. Is there a way to at­tract this kind of dis­cus­sion/​par­ti­ci­pants to pub­lic posts in gen­eral (i.e., not nec­es­sar­ily drafts)?

  4. Is there some other way to pre­vent those ideas/​ar­gu­ments from “go­ing to waste”?

  5. I just re­mem­bered that LessWrong has a sharable drafts fea­ture. (Where I think the ini­tially pri­vate com­ments can be later made pub­lic?) Is any­one us­ing this? If not, why?

Per­son­ally I much pre­fer to com­ment in pub­lic places, due to not want­ing my com­ments to be “wasted”, so I’m hav­ing trou­ble un­der­stand­ing the psy­chol­ogy of peo­ple who seem to pre­fer the op­po­site.