DD intends to do cheerleading at Secondary school. I am quite happy for her to do so, and don't see why football would be preferable. Neither DD or DS have the slightest interest in football or yoga. Both DD and DS have done cheerleading at primary school. DD does 3 other forms of dance, but appreciates the way dance is integrated with gymnastics in cheerleading.
I don't know how cheerleading has developed in the UK, but in the US it is a sport and requires a lot of skill. The outfits worn by cheerleaders are no more revealing than the outfits worn by netball players or ballet dancers.
It is repulsive to compare it to pole or lap dancing. Cheerleading has nothing to do with the sex industry.
Of course you can use cheerleading skills as an adult. Many of the more difficult formations, lifts and throws are banned in under 18 cheerleading competitions. You have to be in an over 18 squad to do them.
Cheerleading involves large amounts of dance. What kind of person intends to never dance as an adult. I have never needed to be able to play football as an adult, but there have been many occasions on which I have danced at social gatherings. Many men cannot dance, presumably because they were not taught as children.