No. If it is a hot area, there will be plenty of bidders for a good house. If the house is well-maintained (e.g., paint kept fresh and not allowed to peel), no one has problems -- and I and most of the people I know live in old houses in NWDC with lead and small children, and the kids are just fine according to their mandatory DC lead tests.
We have replaced some windows and doors along the way for other reasons, which got rid of some lead paint. That, of course, is expensive. We also thought about restoring the original wood windows by stripping them and putting new sash cords, hardware, etc., to improve performance while maintaining the great features of old hardwood. That is even more expensive.
If DC condemned houses for lead, it would have to condemn most of the city, including some very pricey homes. Don't stress about it.