Not necessarily. According to the V&A, 'tie-on' pockets were popular from the 17th century onwards. They were able to fit under petticoats, and were useful to hide anything that a woman wanted to keep to themselves. In an age where you had no personal freedom, they would be a haven where women could keep their private things safe with many choosing to sleep with the pockets underneath their pillows. And they were big, as they were homemade they were as big as you wanted them to be. In one case there was a story of a woman in 1770 trying to hide an afterbirth her pocket! Around the 19th century, the 'tie-on' pockets became less favourable after the Industrial Revolution (although you can still find them on Etsy), where women were not necessarily making their own clothes , and it seemed to go downhill from there. When men design women's clothes there will be tendency to form over function. Still I see lots of clothes which are described as 'seamless'. In my experience 'seamless' usually means 'no pockets'.
Things do seem to be getting better though, as women are demanding more pockets, and I am finding more and more women's clothes with pockets. Still not as big as men's, obviously. But part of the hope of this site, is that it sends a message to the fashion industry that women will buy clothes specifically because they have good pockets.
