Tanith Absolutely agree with you. Nearly every time someone runs a thread about age appropriate clothes or something suitable for someone over 60 or pontificates what 'we' older women want I usually post a winge on the thread.
Related to that is to lump all women of a certain age together as if we we are all identikit 50, 60 or 70 year olds. All of us know from our friends that some people age better than others (I will not say look young for their age, I think that is insulting).
I have a cousin with very little grey hair, slim and dressing like her daughter and looking great, then I have a good friend, much the same age; white haired by the time she was 60 and with the supersoft skin and fine wrinkles you mainly see on women in their 80s and dressed in clothes best described as 'age appropriate'. Looks, taste in clothes, all are completely different.
I think once anyone (M or F) passes 40 there is so much diversity in every aspect of the population that age is irrelevant as a definer of anything.