Even newbie who are serious about Bitcoin and just starting out with it for long terms, should learn about proper Bitcoin protection. I feel that is the main basic step of Bitcoin investment cause its easier to keep your bitcoin in an exchange and procrastinate about moving it to a safer place.
Exchange wallet is not a safe repository of asset for the long term and is never recommended to anyone despite their poor web browsing habit. Some exchange can implement multiple layers of security on their site, but they are not completely safe from hacking activity. Storing your bitcoin and asset in an exchange wallet mean that you have agreed to further risk. Remember one case, not your key, not your bitcoin.
Exchange wallet will only be suitable for temporary use if they are always active in trading (relevant for trader). Furthermore, if you want to hold it for the long term (investor), then a non-custodial wallet (electrum, bitcoin core) is the recommended choice beside cold wallet.
It look like the OP has to revise the misinformation on its site so that beginners are not exposed to misleading information. Beginners need to get the correct information about their wallet as well as where they store bitcoin safely, exchange wallet are just a temporary stopover if they are actively trading and they need to start thinking about a secure wallet if they want to hold them for long term.