I can’t speak for Super or Space, but to me it felt more like they were referring to the fact that Damage heroes have a more noticeable impact on the outcome of the map, and that the potential for an individual to “carry” a team is higher in 5v5.
A common point of feedback I see from damage players is that they feel as though they have minimal impact on the outcome of a match. Especially in the current meta, it can be frustrating when you feel as though you spend most of your resources chewing through double barriers.
They both pointed out that the absence of a second tank (and minimizing the possibility for this particular point of frustration…Brig still exists) creates more opportunity for damage heroes to shine and feel as though they’re contributing in a meaningful way to the match. I think that’s an important empathy point that they both expressed wonderfully that I tend to see missing in the day to day discussion here on the forums.
It’s completely normal to worry about how changes are going to impact your experience with playing the game. Personally, I tend to view it as the “job” of the players to ensure that we hear perspectives from Tank, Support, and Damage mains (and even OTP), it’s my job to ensure that the feedback is communicated in a way that properly contextualizes said feedback, and it’s the Hero Design team’s job to understand the big picture, and to translate that into an enjoyable experience for as many players as possible.