Ah,I get it now - yes, with my own kids, I am careful to use "encouragement" rather than "praise" and focus on effort and other factors in their control. I do think telling my kids they are smart too often puts a burden on them, and also sets up unrealistic expectations as smart is only one part of the puzzle of human growth and success.
Still, I will take a compliment of "smart" any day (and would happily compliment someone who is tall, beautiful, witty, or any other number of factors they didn't 'earn') and hope that they understood I was trying to appreciate something about them!
If it's your kids you are trying to deflect from, perhaps saying "Thanks, they worked really hard on that" might be a way to steer back to the process (or even for yourself, "Thanks, I actually worked really hard on that" or even "Thanks, although I didn't really do anything to earn that compliment!"). But I would also suggest maybe try taking it in the spirit it was likely intended, which was probably positive?
Very interesting topic!