That quote doesn't mean much (if you're talking to me), because support its business is really really undefined. Support its business and thrive in it is not the same.
Also, when talking about public companies, merely supporting the business is not seen as enough ;-); profits must grow don't you know.
For example McD has issues now because its profits are declining; it is still making a lot of money mind you.
Declining profits is a very major problem. A company' operations has been built to support a level of business and then, wham you get a lot less profits the next year or quarter. Are you going to fire 10K employees because you made 10B less, divest buildings, cut R&D and marketing ? What impact will those cuts make. Declining profits, even when still profitable can have a major impact.
You could say, hey they should keep the same people and just try to keep the same revenues/profits to support them... Well, this is very risky. If Samsung for example lost 10B in profits this year, they'd be deep in the red. That means that they need to retrench partially immediately just in case. This has a major future impact.
Another reason declining or stalled profits aren't good at all for a diversified company like Samsung, Sony, big pharmas, etc is opportunity cost. Wouldn't that R&D, manufacturing and marketing money not be better spent elsewhere?
That's why many pharmaceutical companies get out of still profitable older products. Even a company like say Sony, could find that making tablets would be more profitable long term than continuing selling phones even if they're not losing money on the phones. For Samsung, they could say that putting their money into Fab to keep up with TSMC and Intel would be the best investment.