Capitalism and democratic systems don't work without growth. Just look at the consequences of the economy stagnating in western Europe and what that is causing on a societal and political level.

No growth means no jobs for new grads, no growth means workers have no negotiating power with their employers, no growth means young people remain poor and cannot afford families. No growth means young people with bad economic prospects seek political alternatives, and newsflash, they far-right with their magic-grift-politics are far more appealing than the far-left with their estorectic utopian far-fetched plans.

Also no growth means a worsening wealth inequality over time.