I didn't take it as a criticism. Just pointing out my own experience is of people learning a second or third form set. Quickly. And well enough to pass at their Dan level. It's a very small sample, but worth considering.Just to be clear, I wasn't criticising you, I agree, I could teach someone dedicated the whole Taegeuk series in a few days. But that wouldn't mean their technique would pass a grading (particularly at the higher Dan levels for assimilation).
Sure, there's no reason for you to learn them other than curiosity. We don't offer ITF rank. But I still practice the forms because I like forms.Thanks for the offer, being honest I have zero interest in the Palgwae forms (as I'm a Kukkiwon and Changmookwan support, I see that poomsae series as deprecated and unofficial now) - but if I ever come over to your area of the States, I'd love to meet up.