I guess it's all down to personal preferences. Do you want to upload a whole lot, in my case 300+ albums, all with the wrong/no album art, and then have to fix them later, or not.
I choose not, senseless or otherwise, I choose to have it correct in the first instance, or not at all.
The fact that it is "free" is immaterial. This is a sprat to catch a Mackerel.
We'll allow you to upload 20,000 songs in the hope that you will then spend your hard earned cash buying even more music, which incidentally I fully intend to do, and indeed have already done.
If only to save me from uploading them.
I was told as a very young man, anything worth doing is worth doing well, and I stand by my previous statement, that this is indeed a bad advertisement for the service, and make no mistake, that is what it is, a service.
I have already stated that I have had no problems whatsoever streaming my music, you have complained that it was less than smooth in an earlier posting, so forgive me if I am a little confused by your assertion that it is "pretty smooth".