Yeah Gok, mate we really do have great groin defense. Depending which attack is being used, there are different ways to defend. You're right it is designed as a competitive martial art based on muay boran but modified. Muay thai isn't really regarded as flashy as most thai trainers always teach you just rely on the basics and concentrate on precision and timing and power. If you watch some youtube clips of Thai fighters, you will notice that they usually rely on the basics as they see pulling off big flashy moves all the time will get uncoordinated, and wear you out too fast, that's why it's sometimes nick named a lazy martial art, and you're always taught to relax and not go crazy. There are many borkes you can do that may help in giving you an opening. Imo I would call muay boran more flashy.