I don't think it's that. IMO, it's that a lot of DMs aren't great on selling people on this kind of idea.
If you are essentially leading with, "Check out my new campaign, now with 100% more tedium!" many players are going to be (understandably) turned off.
Now compare that with something like a West Marches campaign, which often come packaged with similar "tedious" options, but in a much more attractive box. I've seen lots of interest on the internet for West Marches campaigns, despite it being fundamentally based on an old-school sandbox model of play, because it's been sold well to players. First by Ben Robbins (even though he wasn't trying to sell anything, his articles captivate the imagination) and later by others like Matt Colville (who've also done a great job selling the idea).
IMO, if you want to sell players on this, the best thing to do is to fire their excitement and imagination on the idea. For example, you might regale then with stories from a previous campaign. If you can't get them excited about the idea, I think you either need to either reexamine your pitch, or accept that this group isn't the right fit for that style of campaign.