That’s completely different, OP, as replying a thought on a forum has no backwards context or forward context for either person. It’s a response in a vacuum. The sorts of messages from friends and family most often include plans, in-context chit chat, in-context opinions, etc etc. It takes up way more brain space than responding to something on a forum.
I work full time, have a 3hr round commute, have twins, currently house reno with builders here every day, work a second evening job a few hours a week, have pets, and a vulnerable parent. DH also has all these stressors.
So yes, deciding what on half what about these term plans? do I want these concert tickets in 2 months? Do you want to come to mine for Christmas? Where do you want to grab dinner in two weeks? Are you free for so-and-sos leaving drinks? Do you think I should dump Nigel? Etc etc etc … there is not room in my brain as soon as the message drops, especially when there can be multiple a day.
And any ‘friend’ who takes offence to that and makes it about them can take a hike.