Yes, what you said does make sense; and is true for the most part~
They have, however, been printing more viable cards in tins/collections as of late.
Though, it's usually after they've been in the market for a while~
As examples, they have made tins for: Hoopa-EX, Yveltal-EX, Solgaleo-GX, Darkrai-EX, as well as a collection featuring both Jolteon-EX and M Manectric-EX.
These are all cards that can, and have, seen use in decks~
This is probably used as a way to get money from the people who wanted the card, but couldn't afford to buy boxes to get the card from the set.
A lot of the time, this also includes alternative artwork for the cards as well; netting even more money from collectors!
Pokemon knows how to make money, that's for sure!
So, it is possible to see a Lele product in the future... though, it could be very far down the line~