It is not necessarily useless. My lawyer recommended. And I also did that for my green card. Sometimes VO officers are not up to date on all the rules, actually.
Also, if they are aware of said rules: attaching the rule makes it harder for them to exact discrimination by denial. Because they know you know they can't deny on the basis of strong family ties in the context of spousal TRV, since these are designed exactly for this and since you provide the official ircc documentation that says so. If they are just looking for a reason to deny because they have psychological issues (and I have met public servants that are just mean and abuse their power in the USA), they realize your file is harder to deny and move on to one that will be easier for them to deny.
I get my info from immigration lawyers. I am familiar with processes in Canada and the USA. When it comes to attaching new press release stating rules, it never hurts and can be useful.
Please, speak on what you know instead of spreading misinformation.