It is NOT unimportant. At home on my computer, it is an annoying irritation, having to scan side to side & up & down several times to see what the pic is supposed to convey, or to find the reply window just so I can answer.
But on my tablet at my place up north, (my only access there is thru cell tower) it is a major PITA.
Once I click on a thread with these ridiculously sized photos, the tablet locks up while trying to download this HUGE chunk of data. I can't even quit the thread for several minutes, because this huge data dump is using up all the data in my plan. So one person's ignorance or uncaring attitude can ruin the experience for others.
I realize some newbies may not know about the size limitations, (which are clearly stated) but this has been covered on the forum dozens of times.
I, and 98.5% of other members, check and resize our photos before posting; I fail to understand why it is such a big problem for the other 1.5%.