Its funny how people always talk about how Culas lead to OTD’s but never say chumras lead to OTD-ness
Sorry, your post is nonsense. The people who say that indeed do think that kulas lead to OTD, and that chumras have the exact opposite reaction. There is no inconsistency in that theory.
Although, I happen to think that neither leads to OTD. Depending on how you define kulah. If you define kulah as not keeping normative halacha, then yes, teaching your kids to not keep normative halacha means you are OTD and your kids are probably the same as you.