I had a friend in college once who could never remember where i was from. She called the midwest the "I" states - as in - 'Oh yea - you're from one of those "I" states'. Never mind that many don't actually start with "I", I think there just had to be an "I" sound somewhere in the name. But yes - I was and am from one of "those" states.
I know - it's all about the journey, not the destination: ttwd, life, love, all of it...
But I can tell you, as someone who routinely makes long car trips across the middle of the mid-west (also called fly-over country), that there are parts of some trips in which the scenery can be less than captivating.
Sure, the journey sometimes affords an opportunity to talk with your kids (captive audience), talk with your spouse (but nothing too intimate - remember the kids in the back), torture the kids with mom and dad music, sleep, or read a whole novel out loud. All worthwhile, necessary sometimes, often even enjoyable activities. But you still wouldn't traverse multiple "I" states in the winter just for the fun of the journey.
In those times - the promise of the destination is often what makes the trip bearable. The destination is in fact why you started out and undertook the journey in the first place.
I don't approach life as having a destination. I haven't had a plan for where my life was headed, didn't have my husband/wedding/kids planned by the age of 9, don't have my ideal career path mapped out, don't have any specific vision when i dream about retirement. I tend to make each choice as I approach each crossroads. But certainly many people do it differently from me: they set goals, lay out a plan of action, work on the plan, and know exactly when they have arrived (even if they don't know what to do once they get there.)
On the other hand, it's hard for me to imagine a way to approach love as a destination. How would you figure out what the final or absolute love looked like, or how to get there? How would you know if you were still on the path. Sure - some roads definitely don't lead there, and there are times it's pretty clear you've strayed way off the path. But really - love is the path, not the endpoint. Or maybe - love isn't related to the path or the endpoint at all. Maybe love just is. It can accompany you where ever you go, what ever other paths you take.
So TTWD must fall somewhere in between. In life, i understand that some people can point to the brass ring and say that is their destination. I can't look at ttwd and see a logical end goal. Although it does feel more structured, more defined and explicit, more step-wise, which makes it seem like it ought to be leading somewhere specific. But it obviously isn't leading anywhere in particular - there is no brass ring or top tier to reach.
There are those times that this trip is just not captivating as other times. Or as internally motivating. If any trip goes on long enough - there are portions that lead to the inevitable "are we there yet?" or "I'm bored!" Like the "I" states - the incentive of a goal might be useful. I guess the trick is to relax and just wait to see what might appear around the next bend.