No haven’t driven “coast to coast” in Canada. I’d like to.
I bet a less percentage of Canadian’s have done it compared to Americans.
Firstly, bulk of Canadians (22 million of 36 total) live in east/central Canada,
Ontario and Quebec. Most not living near a “coast”.
For Ontarians to do a coast to coast drive, first we’d have to drive to the east coast,
which is a two day drive from Ontario, then double back heading west
passing through Quebec and Ontario again to travel to the west coast.
How many people are gonna do that? Not many.
One of my uncles who lives on the BC west coast did travel all the way to Newfoundland
by car. He was glad he did it but it was exhausting and he never did it again, prefering
driving down to California and Arizona instead, much shorter and more rewarding for him.
Canadians are also very tempted to cheat

...
meaning going through the USA at some point.
I have driven to BC from Ontario a few times, a couple of times I have gone out of my
way to travel an all Canadian route via Trans Canada Highway but it is longer, slower, and a tougher
way to go, I find northern Ontario particularly exhausting to get through.
The US interstate highways, cheaper gas, food, and lodging has a strong pull to travel via USA.
To either coast, for example, my parents drove to PEI the all canadian way but returned through the US...
Maine, New Hampshire, Vermont, New York state.