I disagree with the previous reviewer that this is binder fodder. It's not an amazing card, but it's certainly playable and I've run it in quite a few Seeker decks on Hard/Expert. (Admittedly cycling it out later in the campaign when I get more XP). There are two main reasons for running it.
Both of these are the strongest seeker cards in the game, and you're probably running both (If not, why not? Tell Finn the good Doctor is yours!). Dr Milan is often giving you a surplus of cash that even Higher Education doesn't drain. Additionally Higher Education needs 5 cards in hand and if you go through a period of encounter card, pressure, you might quickly need to fill you hand-up again. In such a scenario, if you were going to be clicking for a card anyway, the sketches come good.
The previous reviewer suggests that, because the sketches actually do very little (if you were clicking for a card anyway, their net effect is a free action to swap 2 resources for a card), this is bad as they've used a slot in your deck. But the opposite is true - this is deck thinning, and this is good! Cards that replace themselves at very little or zero cost, are making it more likely you will draw into the cards you have spent real XP on (or 0XP cards that are just boss). And seekers have lots of high-impact cards that mean they like thinning. The sketches aren't truly free thinning, you have to spend the 2 resources for the bonus card, but they are pretty close.
Yes, you do need to be aware if there are weaknesses left in your deck, but this is a general part of card-draw and play-management within the game, not specific to the sketches. Eg, if you have a enemy basic weakness and your guardian has already played, or is busy, then drawing is much worse. I don't think one should be discounting draw effects just because sometimes draw can be bad. Drawing cards is, in general, a good thing and we should be constructing decks that want to draw (especially when we can control when that draw happens).
Backpack exists, yes, and Backpack is stronger if you have the deck to support it (lots of items, or specific high-value items you need to find). Without that scenario, and faced with the common Seeker scenario of wanting cards and having money, the sketches do have a slot in the Seeker playbook.