IMO there really isn't anything you can do to prevent people from making a product out of your work if it is open source, but what you can do is make sure that if someone makes improvements to your work, those improvements need to be publicly available under the MPL2.0 license as well.

This has the effect that if someone wants to make a product by just 'adding one line' that line needs to be published and you could add it upstream, making it publicly available again(thus making it harder to make a product solely from your code).

[1] https://choosealicense.com/licenses/mpl-2.0/

Well, they can do that with the GPL thus spawned the AGPL which didn't fix the problem either thus MongoDB and companies licenses.

"everybody can use this 100% free of charge but please don't change one line and call it yours"

Well, the BSD licenses require redistribution and use in source and binary forms are permitted provided that the above copyright notice and this paragraph are duplicated in all such forms

I know some GPL advocates tend to feel they can remove the copyright statement, but BSD code is BSD code and requires your copyright statement to be preserved.