Even if someone was dressing younger to get attention I don’t really see a problem with it, but maybe I’m biased because I think everyone should be able to be slutty or promiscuous as long as they’re being ethical about it.

One way to look at it is different standards - my mother-in-law, also somewhat old, wouldn’t be caught dead without makeup and hair, regardless of the reason. You assume she’s dressing for others. She’s dressing for both herself and how society use to be.

I’ve seen some straight GILFs at my job, and they dress “young” for their age.

Putting in the effort to dress in the way one has come to think is appropriate for appearing in public is a form of self-care. For some people, from certain generations or cultures or who have adopted the habit to their identity, that may be more formal or elaborate than for others.

That a person of an advanced age, possibly suffering some mental decline still does this is a great thing, and very good for their well-being.

You sound young, so this response is based on that judgement (pardon me)

Answer to your question - No you won’t. You decide how you want to live your life. You can look however you want as you age up.

Another thing to be mindful of - Life is shorter than it seems. Prejudices are needless burdens that creep into our minds — the sooner we let them go, the more fully we can live.