At it's basis it is the same, but I think the reason that most artists are against it is because when other people repost it, then the number doesn't go up on their end but will for the other person. If the account is big enough then the number will go up thrice as high as for the other person as it would for them and if the account didn't credit them they get none of said repost's power. For a lot of people who are or are trying to make social media/internet artist a job, the number going up for them and them alone means life or death.
I agree with your thoughts though. There are so many pictures from the 2000s that I only was able to find from reposts and imageboards like Derpibooru, Danbooru, Zerochan, etc (which btw, the imageboards I feel do image reposting the best as getting the highest quality copy, sorting everything, and making sure the source is found is priority). There was one piece from an artist I found from a
WINAMP SKIN that I would not have seen otherwise as all of their stuff was exclusively posted to a niche art website in the 1990s that is completely unarchived by the Wayback Machine. Even though they put their real name on the art and was given a link, there is absolutely nothing of it left (or even any records of the person for that matter). The only work that survived was that Winamp skin and that was, even then, only by chance. That Winamp skin was made by someone who wasn't the artist (though they did ask for permission before making it according to them). Artists like Eric Schwartz had their work traded on floppies in the 90s and despite there having been hundreds of other artists at the time making furry animations for the Amiga, his are the only ones that survived into the future
because they were shared around so much and because there were so many copies of it (that and he generally stuck around for a while in the 2000s and 2010s so if someone looked up the name they would be able to find him or something relating to him to go from there but still).
That being said, I don't know if it is necessarily a one-size-fits-all thing. Like I said at the beginning, people who make internet artist their job need the number on their stuff alone, hence why they enforce the art to not be reposted. For those, it surviving on would be less of a priority to the immediate income that would come from it. We could probably argue how valid that is and being a social media influencer is till the cows come home, but the point I am trying to get at is for some people, reposting would be detrimental not just to ego but to their livelyhoods. Regardless of thoughts on capitalism and defining yourself by the numbers big corpos enforce, it is something that affects people's income and I feel like those thoughts shouldn't entirely be discarded.
My personal stance for my own stuff is I don't mind
too much so long as my signature/watermark isn't being cropped out or credit isn't being taken. Said watermark has my name, and I have so many accounts and have had them for long enough under the same name that people can find the source fairly easily I think. I'd probably be pretty pissed off if their number went higher than my number of course since I barely get anything when I post it, but I try not to care about all of that stuff and as long as it can be seen where it comes from, then people who do care and want to see more can go on a journey to find me from there. But I
have DMCA struck people who try to take credit for my things in the past (have only had to do it twice but still).