No. The tonal range can be only as great as the tonal range of the photographed scene, you can't make it greater than it originally was by taking more exposures. Your camera sensor's dynamic range is approximately 12 EV. If we multiply it by 14 and say that there's 50% overlap, you would need a scene with dynamic range of 84 EV to justify taking 14 exposures. Just for comparison, a human eye has dynamic range of 20 EV (that means 2 exposures should be enough to capture everything you can see).
If you want to create a panorama, you don't take multiple exposures, you only take multiple photos but you can't change the exposure, otherwise one part of the panorama would be darker or lighter than another one. This is a classic HDR photo, I just wanted to point out that 14 exposures are an overkill, if the photographer took 3 or 4 exposures, the final image wouldn't be any different from this one.
You could use exposures as a different word for photograph though, couldn't you? 14 exposures might be a bit overkill, but the devils in the details, I'm sure 14 as opposed to 4 gave some greater detail or something, no matter how hard it is to notice.
Here's a sample HDR photo from my gallery: fc09.deviantart.net/fs71/f/201… - 5 exposures, taken with a 5 years old APS-C DSLR (Nikon D300s). Check the histogram - no blacks, no whites, everything that was in front of the camera has been captured. Adding more exposures would have no benefit whatsoever.
And bear in mind that we're comparing a 5 years old APS-C sensor with less than a year old full frame.