Sony sold 150 million PS2s Nintendo and Microsoft sold under 50 million consoles combined that generation. Where were these concerned for the industry people then? When one company was controlling 75% of the home console market nobody said shyt.
The concern isnt about the industry its about who dominates it. When Sony dominates and uses those advantages to engage in anti-consumer behavior and anti-competitive behavior flat out ignores the other companies in the field because they're so far ahead that's fine but if another company even sniffs the possibility of becoming more competitive it's a problem.
You know what happens when a company dominates the status quo for too long? Intel. AMD is eating their lunch now and Intel is scrambling to fix deficiencies they developed not having to really compete with anybody. Companies need real competition to stay on their grind.
At this point, M$ is making Sony act all out of character with buying out companies and poking at the money hatting processes since the PS2 era. Sony's ultimate goal is to be the ONLY console maker and charge $1200 per console when the competition is gone.