What the actual benefit of shovelware is, that if a system has has decent amount of high-profile A titles and a load of shovelware, which fits the genres of the A titles, the high profile titles work as system sellers and get people to buy the system, while people see the shovelware titles as something they might buy after finishing the "system seller X". It doesn't really matter if the games beyond the one title you're interested in are high quality or not, as long as you see a decent amount of games that you might be interested in to justify your purchase.
The shovelware usually doesn't live up to expectations, but since the main interest was on "game X" and it propably was what expected, it doesn't matter that much, there will be titles that interest you anyway. And besides, some of the shovelware may actually be what you like and offer you playing until the next A title you like arrives.
Then there's the hardcore crowd, who usually is very well aware of the games quality and is the title something you like. They don't buy the shovelware (atleast not that much as others), but the shovelware still has few games that interest the hardcore.
Ei Kiinasti.
Eikä Japanisti.
Vaan pannaan jalalla koreasti.
Nintendo games sell only on Nintendo system.
