At least among the Harvard faculty, there appears to be a consensus that healthy fats are important, which the Canadian guide doesn't seem to stress that much.
https://www.hsph.harvard.edu/nutritionsource/what-should-you...
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Comments on the Harvard Healthy Eating Plate (https://www.pbs.org/wgbh/pages/frontline/shows/diet/intervie...):
INTERVIEWER: Some nutritionists have criticized your pyramid as "floating on a lake of olive oil."
WILLETT: The formal studies that had compared a more moderate fat intake as we've suggested, with low-fat diets, have actually consistently shown that people did as well or better controlling their weight on a moderate-fat diet compared to a high-carbohydrate, low-fat diet.
INTERVIEWER: Even good fats are more fattening than good carbs. So they think you're contributing to the obesity epidemic, or there's a risk of that. A tablespoon of olive oil is 14 grams of fat.
WILLETT: There are all kinds of beliefs about the amount of fat in a diet, tremendously strong opinions. What we really need is sound data, and the studies that have been done show that people actually end up controlling their weight at least as well, and usually better, on moderate-fat diets compared to low-fat, high-carbohydrate diets.
INTERVIEWER: Is it okay to get more than 30 percent of your calories from fat?
WILLETT: The evidence is quite clear that it's perfectly fine to get more than 30 percent of your calories from fat, and probably, in fact, it's even better to be getting more than 30 percent of calories from fat, if it's the healthy form of fat. ...
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EDIT: formatting
Aside from that, weight is not the only issue. A high fat diet (even a vegan one) is not good for your cardiovascular system.
There's a widely quoted study by high-fat diet proponents comparing two groups eating a high-fat Mediterranean diet (one with olive oil, one with nuts) to a "low fat" control group: https://www.nejm.org/doi/full/10.1056/NEJMoa1200303?query=re...
This study can't really be used to advocate a high fat diet, though, because all the diets (even the control group) were actually high fat. Looking at page 28 of the appendix (https://www.nejm.org/doi/suppl/10.1056/NEJMoa1200303/suppl_f...) shows that the fat intake of all three groups was really very similar -- about 41% calories from fat for the olive oil and nut groups, but only...37% fat from the control group. 37% calories from fat is not "low fat".
On the other hand, a true low fat diet, with fewer than 10% of calories from fat, has been shown to actually reverse the progression of heart disease: https://www.ncbi.nlm.nih.gov/pubmed/7500065 (this was one of the first studies to demonstrate this, but they've repeated this with larger groups and gotten the same results)
I know almost nothing about health studies, but I read the abstract you link to and there's no mention of randomized control group or other mechanism to prevent bias.
Tried a quick search and came up with this Wikipedia article:
https://en.wikipedia.org/wiki/Saturated_fat_and_cardiovascul...