an older lady with shoulder length white/grey hair seems to be in every other advert. She's not even attractive but obviously fill some sort of requirement.
https://adage.com/creativity/work/each-and-every-day/48730 - she just seems to be in everything. Someone obviously said we need an old woman with long white hair to sell our products. It wouldn't make me buy anything and I am not in the first flush of youth and have got white hair!
Subconscious ancestral fear of the crone expressed as an aesthetic concern. We wear our white or greying hair and lines as we carry other scars as symbols of life lived. Old women exist, get over it.
Some times all you need is great acting skills and way of speaking which we call marketing and for some peoples white or grey hair are also very attractive so stop being judgemental may she is getting so much work due to her skills.
thanks and have a nice day.