Yes, no doubt with that. Still we can say two things.
1. They(lawmakers) like it because they can use it for their next level corruption.
2. No, they don't like it because of its transparency and they'll be caught in the act if they support it.
You can't use Bitcoin for corruption in this sense. It is the worst instrument that you could possibly consider for corruption. There are ways that you can cheat like overpaying for it through intermediaries that charge extremely high fees, but any such corruption will be obvious right away. If you buy Bitcoin at $120k a piece, but average price is $110k during this period of time it is clear that you stole money. Also it is very easy to audit a Bitcoin reserve, so it is very difficult to try to hide any fake purchases too.
Yeah but I am not sure if this is just investment exposure, not like a reserve. With that I mean they may sell during a big pump or a big bear market. That is not that great then.