"I don't believe she was agreeing with you. She doesn't appear to have used the word "impact" which would have negative implications, just to have made the obvious comment that Brexit will have a longer lasting effect on the younger generation than on the older"

The word impact does not mean negative. If someone knocked on my door this morning and said here's a million quid it would have an impact on my life ............ a good impact.

However I think Brexit will have a negative impact on all our lives, we're seeing some of the effects already, (dearer food, petrol, diesel, electric, gas etc) and those effects will be felt by the younger people for longer.