That's why I classified it as my opinion, rather than the rules.
This is rather similar to the concept of: "Can I take Rhinos and Razorbacks in Unbound without buying them as a Dedicated Transport?" On one hand, the rules state one thing, that you can take whatever you want in your collection. On the other hand, they won't have a battlefield role and one USUALLY must buy them with another unit.
In the same vein, I do not see a rule in the C: AM that says one must take an Infantry Platoon to get a Conscript Squad, either, but I am running off an old digital version that may not be up to date, and not the hardback. All it says is that it has an Infantry Platoon contains this mix, and all of it counts as one Troops slot.
So, from that perspective, a Conscript Squad could count as a whole Troops Slot choice on its own. Scary.