Am I setting him up for failure?

My mother-in-law recently told me that I should be spacing his feedings during the day a little bit more to help him sleep through the night. The idea being that he will get used to going longer stretches at night. I've been following the eat-play-sleep routine but now I'm paranoid about what she said. Did I mess up?

And no, I'm not trying to sleep train him.

Edit: he is 6 weeks old