I expect he means "can't" as in, "I do not have the technical knowledge or time to devote to doing this, so I'd rather run something with first-party support". That's what I mean when I say "I can't make my own _____".
Similarly, I can't make my own rifle, or design my own airplane.
Could you elaborate on this please? "can't" as in "it's too much work" or "can't" as in "impossible for some technical reason".