The comment was made in an interview which is on YouTube at
Tomlin interview. It was one sentence in a broader overall statement responding to a question about Tomlin's future. If you go to 4:47 on the video I linked you can hear the totality what Rooney said about Tomlin and make your own assessment of the meaning of that specific comment within the context of everything Rooney said about Tomlin. In particular immediately before the "I'm glad he's our coach" bit, Rooney did state in terms of assessing his performance he looks at whether the team performance improved over the course of the season and he said it clearly did (bear in mind this interview was in January 2023 and looking at the 2022 season).
To me it seems what he was basically saying was he was happy with the fact the Steelers are in and around the playoffs nearly every year and in his mind that gives them a chance to compete at the pointy end of the season, notwithstanding they haven't actually done so since the Super Bowl loss to Green Bay (apart from a brief flirtation with the pointy end in the year of the AFC Championship loss to New England).
I also think if you look at the Jim Rooney article that has been linked in threads on this forum, that gives you an idea of where the future is headed.
Unfortunately whether you, we or anyone else likes it or not, the goals of the ownership of a sporting franchise may not be the same as the fans. The fans generally have one goal that represents the vast majority of what they want from the teams they support, which is WIN. Owners of the sports franchise have making a profit and increasing it's value as a major goal, along with winning, they also may have other goals such as community connections and personal development of their employees (both of which seem to be a big thing with the Rooney family), or raising their own profile and status (not naming names, but there's a guy in Dallas who comes to mind). Fans may share an interest in some of the goals apart from winning but not to the same degree. Fans are also not as connected to the people and relationships a sports organisation has - it's easy for a fan to want an organisation to fire someone they don't know, nowhere near as easy for an employer to fire someone they have worked with over a long period of time, and whose results whilst not elite, are above average to good.