if they do not support Sony in consolidating, all of Japan will be relegated to being a second level or third level participant in the gaming industry.
In the recent years most of the Japanese publishers like Nintendo, Bandai Namco, Sony, Square Enix, Capcom or Koei Tecmo (and almost Konami) are performing better than they ever did before. So it's not that they are underperforming. And that also means that very likely won't want to sell now, because having grown in the recent years means that potentially they can continue growing, so to sell in some years for a bigger amount of money.
And being acquired would benefit them if that would help them grow, like allowing them to bring their IPs to more markets or platforms, to be able to make bigger projects or to work in more projects. It wouldn't benefit them if that acquisition would mean to leave a big portion of their current markets, as it would mean to leave pc and other consoles.
So very likely, if they buy to Sony or someone else would be in a similar fashion than they did with Bungie: to keep them multi as they are now. That would also benefit Sony because these subsidiaries would give them more money than being fully exclusive. Being bought, they could block any exclusive for the other consoles and game subs, including even bundles or marketing deals or minor stuff like demos or exclusive dlcs or preorder bonuses.
If Sony doesn't start acting, they will fall behind in output (numbers, not quality), revenue, possibly subscribers if these IP's get any traction under gamepass and some other metrics.
That won't happen because Zenimax, Activision Blizzard King and the other few studios bought represent only a small part of the Sony sales. So even if all their games went exclusive Sony wouldn't almost notice it.
In addition to this, Sony is growing in all areas and are working to grow even more in all areas. This means that in some years Sony will be bigger and more powerful than today. As they estimated, I think Sony will increase their market share during this generation instead of decreasing their market share in consoles or game subs. And they'll also slowly grow in PC, mobile and movies/tv shows, which at the same time making their IPs more popular, will help them grow even more in consoles.
Don't worry, everything will be fine. Jimbo and Hermen have it under control.