You hit the nail on the head. Jammers are just long legged lycra suits. The knee length competition suits are specially designed and constructed out of special materials that can actually improve a swimmers performance. The problem - all that technology is cost. Those suits can cost 4 times what the brief cut suits cost. Most schools or swim teams don't have it in the budget. They seem to only show up at events like the Olympics where the makers can get world wide recognition of their suits so they donate them. (subliminal commercials)

"Suit Technology" is just one form of mechanically assisted swimming, so in addition to suits, why not allow flippers, webbed gloves, and snorkels?

Or is suit technology just an excuse to have men cover their upper legs - especially in swimming meets that are held in public view?

Furthermore, women swimmers don't wear jammers and their legs are fully exposed as they have been for over 60 years.

https://www.youtube.com/watch?v=gJcWQ3jBGIU

I'm not buying the "Faster" excuse and jammers are just a streamlined version of knee length board shorts that men always wear in public and they are the equivalent of "Leg Veils" or a "Male Burqua".

At the high end races where the men are warring tech suits down to the knees, the women are as well.

99% of the guys you see competing in knee-length tech suits on TV train and compete the rest of the year in brief-style suits. The televised meets tend to be important, though, so they pull out the expensive tech suit for those ones.

I guarantee that modesty is not a concern for them; they spend a massive chunk of their lives in briefs already. Go ahead a look up the various youtube channels or instagram pages of Olympic-calibre swimmers.

Nope - Not Buying it.

Take a look at all the YouTube videos of competitive swimming and notice how they have very few viewers and no comments.

Most people are not interested in watching swimming and it does not provide much exposure for advertising by the suit makers.

Huhhh???

Take a look at all the YouTube videos for women's swimming and not one of them show women wearing jammers. Furthermore, jammers are a unisex suit that women wan put on instead of the bottom of a conventional suit. So there's no need to buy "womens" jammers when mens will do the same thing.

The X and Y back suits for women made swimming much easier.

I have occasionally swam in a guys jammer with a rashguard. No big deal.