I think this misses the point. Countries like US or Israel are perfectly capable [0][1][2] of offering such systems. And they do because it gives them another solid "string" attached to the regime receiving it. Their problem is that now the string (and all the knowledge, power, influence that come with it) could go to China. Hence the campaign to discredit them simply by suggesting this behavior is limited to them. Putting the facts in perspective would undermine this.
[0] https://www.haaretz.com/israel-news/.premium.MAGAZINE-israel...
[1] https://www.haaretz.com/middle-east-news/report-saudi-arabia...
[2] https://www.washingtonpost.com/outlook/2019/01/17/how-us-sur...
China on the other hand has almost 8 million people for every country on Earth. Imagine how many people they could assign to messing with each country around the world if they wanted to.
These are totally different players.