[Devid2014]

Last info I got from peoples who lived in Kazakhstan s that you need to use custom certificate from government to use HTTPS and such stuff.

This mean that MitM will be done for all HTTPS traffic there.

[vbezhenar]

Some government websites use custom-signed certificates because of some stupid reasons, so if you want to use them, it's suggested to install those root certificates, so browser won't complain. That's the only reason I could imagine that someone told you about it. You don't need those root certificates for other websites.