I am sure that he can't give up a legit reason because I don't think he can see the future lol. Maybe all he can do is to lie right now so we must be careful on believing on what we hear and see because what if that won't happen or the opposite only occurs? 5 years was still long so we can't tell if BNB and Binance exchange sustain their momentum.
I think the ones you are talking there (government targeting Binance) is already an old issue and might be sorted out already. The current issue we are only facing right now is still the bearish market. Maybe we can remain like this till we end the year but that should gave us a more buying time.
Since BNB depends on the binance exchange then there are several additional risk associated to this coin, and probably the most serious of all is a liquidity crisis, and we have an example of this with what happened to the FTX exchange.
Due to a series of bad moves and the bear market the FTX exchange found itself in a perilous situation in which the smallest setback could send them in an out of control spiral, it happened and then the exchange basically closed its doors in a single week, and while I doubt this could happen to binance anytime soon, there is no guarantee CZ will keep making the right moves all the time.