How is it different from any new game coming to Steam? You either buy it at launch or not. If you decide to wait you have more impressions to base your purchase decision on. Although what's different from buying games is obviously the 24 hours return policy. If it doesn't work then get your money back. My personal stance is that I won't buy anything that doesn't have a plethora of positive reviews. On the other hand I realize that some people are more adventurous.
Games are not the same as mods. And even though, there's a lot of garbage games that go through steam's "QA" where the sole purpose is to get a quick buck before being found out.
Games are a way more substantial efforts that takes months, dozens to hundreds of people, QA, goes through ESRB, and also have to go through the platform's holder QA in some place (Sony or Microsoft also test the game to ensure that it works on the platform)
Mods, especially for skyrim, can downright break the game (and sometimes, as others havep ointed out, not immediatly. You could get past the 24h00 refund time before noticing it), and most are made not by certified professionals or setup companies, but by a random person or a group of random people. And usually, it's "portfolio" work for the most part. Some of these mods can outright break the game. Others use mods made by other people, and these people are less than happy seeing their work being monetized, as evidence of a lot of work being taken down on the nexus.
That's the same argument as for "bad" games not being there. I disagree, and apparently Valve also disagrees. Amazon can and should allow the sale of "bad" books, and Valve can and should allow the sale of "bad" games and mods, and people can decide what to buy.
You can't argue against a "corporate overlord" on the one side and then ask for one to filter your purchasing options on the other.
When I say "bad" games i mean outright broken or derivative. Yes, I would like if steam didn't let the plethory of "[INSERT NAME] simulator". I think it's also part of their job to filter out games that are completely crass and offer no value to the consumer. I am opposed to steam/valve just shunning responsibility for their platform and becoming just an anything goes marketplace where the responsibility is completely on the consumer.
It's similar to real life malls who are trying to get rid of personel and just setup machines so you do all the work. Call me an old reactionary, but I don't like that setup, at all.
And especially when Valve and Bethesda do take a major chunk out of the creative's money, leaving them scraps to fight for and, in theory, could create a completely unhealthy modding scene where creativity and good-will will no longer encouraged, only the flashiest quick-buck scheme. My "corporate overlord" (granted, poor choice of words, but I stand by the concept) is about both Valve and Bethesda who offer no added value to the consumer (i really really doubt Valve, in the long run, will be able to sustain any kind of quality control or notice when a mod uses the work from someone else. They can barely keep up with greenlight), give the short end of the stick to the creators, and line their pockets after already profiting from modding as it is.
I am not against modders getting a profit for hard work as it is. In fact, would be great if the ones who did the best mods would get compensated. But the way it is now, I see it as a disaster. In an ideal world, yes it could work. But we don't live in an ideal world, and I don't see this system improving the quality of mods, or it's community