Does choosing to cover up my body in public spaces mean that I lack self confidence?

I wear long dresses and skirts everywhere, I never ever show cleavage, I never wear bikinis at the beach public pools, the shortest I would go on a dress/skirt is below the knee, I do not wear body con long dresses/skirts, just the flowy like ones no slits either, and I have heard people tell me that doing this means that I lack confidence, I'm too young to be dressing this way and that I need to show more skin, are they right?
an example of a long dress length wise that I wear, I would wear this.
an example of a long dress length wise that I wear, I would wear this.
an example of what I would wear as a sexy dress in public.
an example of what I would wear as a sexy dress in public.
Updates
+1 y
Thank you everyone for sharing your views on this question of mine, a lot of you were super kind and helpful, unfortunately all I can give you in return for your assistance is a helpful reaction and a sunflower emoji, it does not sound like much but i do hope it will show you just how thankful I am 🌻.
Does choosing to cover up my body in public spaces mean that I lack self confidence?
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