"The person became unclean as a result of violating the law. (He did not become ceremonially unclean. He became unclean.)"
Ellicott's Commentary for English Readers
"Neither shall ye make yourselves unclean.—But not only is it disgusting to eat these abominable creatures, but their carcases defile and debar him who comes in contact with them from entering into the sanctuary and from partaking of the sacrificial meal."
Gill's Exposition of the Entire Bible- Leviticus 11:43
"... that ye should be defiled thereby; in a ceremonial sense."
The context of Leviticus 11:43 does seem to indicate it would make someone ceremonially unclean, so your statement does not seem to make any sense.
Assuming that you meant that anyone who ate these swarming creatures would be, not just ceremonially unclean, but also (at that time) unclean and loathsome in Gods eyes.. What of it?
The command in Exodus was a general instruction to not eat an animal's dead body, found torn apart by another animal. This could happen in or around Israelite dwelling places.
That is good hygiene, as SAHS pointed out.
The instruction to bathe in Leviticus 17:15 was after an animal had been found dead by someone specifically whilst they were hunting for food, according to the context.
And how does Leviticus 17:15 even relate to Leviticus 7:26?
Chapter 7 is clearly talking about animal sacrifices, animals killed and offered as sacrifices in Israelite dwelling places. (Anyone can read the chapter themselves and see that).
Without a clear explanation of your specific point relating to this topic, you are wasting space.
Please explain, and state your point clearly.