All of these are fair points but you are clearly a very experienced playerI will argue that it is optional.
As I said before, it depends - on what ship you fly and who and how many are after you.
If it's a wing, then sure it's better to hi-wake, but once you get some practice it can be fun to mess around with your ganker(s) in SC. Keep facing them while idle (works only if you're not facing a team), or fly out into the black and let them follow you; make a meta-game of it to see how long it takes until they cop on and give up. You can drop in and out of SC/normal space if you want to arrive at your destination, if you're on PC just switch on the bandwidth monitor and as soon as the numbers go up you hit the FSD.
I've done this with attacking wings in the past, including those for whom wing-ganking is their sole raison d'etre (beats me how they don't get bored but as long as they have fun I suppose).
Or spend some time in the orbit of a planet, where you can't be interdicted. The ganker will eventually lose interest and you're good to go -
Hi-waking means you have to start afresh from the star entry point, and you'll likely be instanced with the same crowd again, Groundhog Day style. It's only my if-all-else-fails option.
Again, it depends. My combat fitted Courier boosts close to 880m/s, even my SRV-laden exploration Courier boosts about 750m/s, and both are sturdy enough to take a few rail hits - no point in moving towards your attacker as you run the risk of them being able to ram you. That's more risky than them catching up (which they simply won't).
For noobs in unengineered ships though, yes low-waking is usually a death sentence as they tend to panic (I certainly used to) and also may still lack the spacial awareness and don't keep an eye on the radar.
There are always a lot of exceptions and "whaddabout this..." and so forth, but no reason not to send new-ish or just less experienced players a clear toolset for dealing with gankers.
After all, once someone is confident they can survive a gank, then they can - if they wish - begin the cat and mouse game as you describe above.
Anyways your comments are all valid, of course, my point is just that for those who have not yet mastered the basics... better to give them the basics