Female or not I'm not sure Susie is the best example. Her DTM career didn't add up to very much at all, in fact neither did Vanina Ickx's or Katherine Legge's - though in fairness DTM would operate older chassis for some drivers during that era, but at her best Wolff was only mid-pack amongst those drivers.
She never won a race, got a fastest lap or scored a pole position in any of the feeder series (Formula Renault, British F3) before graduating to DTM where she scored a total of 4 points in 7 years, again with no fastest laps, poles or wins or podiums. In order to be considered for an F1 drive Paul Di Resta had to
win the DTM championship, with Bruno Spengler having the same opportunity also through Mercedes
if he won the title... so... I'm going to be that guy... she would not have been picked for an F1 test driver role had she not been married to Toto Wolff, a major investor and Board member of the team that hired her.... I'm sure that statement will be triggering for some, but it's really no different to saying Lance Stroll would not have an F1 drive if Daddy Strulovich didn't own an F1 team or bung Williams $80 million dollars.
I think one of the last times Wolff raced was at the 2015 ROC, which I recall as I was there, Team Scotland (her and Coulthard) didn't win anything in the Nations competition, and in the individual competition she didn't win anything either - being beaten both times by Coulthard.
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All that said, nothing against Susie, she just wasn't particularly good.