Making fun of me wanting to dress my baby?

My mom and step dad always say my 4 month old should just be in a diaper because he's more "comfortable" that way 
Well when I was pregnant, I invested in a lot of clothes for him. So I always put him in outfits (onesie, matching socks, bib, and pants). And then sometimes I will just put him in a sleeper. When he spits up in his clothes, I change him 
They say, "wow he's in another change of clothes" 
Really people 
Am I the only one that dresses their kid or???? (Rhetorical)