You may not see the advantage right now if you're still youngish and in good shape, but wait till you get a bit aged and beat up!
Still, the single piece design and easy loading and unloading make more sense from a convenience standpoint at any age.
For me, the attraction of TTO is two fold:
1. Ease of blade change - Loosen, drop, tighten, done.
2. Ease of clearing during and after a shave - Loosen, swish, tighten, done.
It saves time. This is additionally the case for us that remove, wipe our blades and rinse our razors after each shave.