Or you could just fly into the hole. [emoji14]
Yes, I am fully aware there are ways to circumnavigate the climbing requirement.
No, that doesn't change the interpretation of the spell, because climbing in was only half the problem with it.
The other problem was the duration:
It's exactly one hour, what are you going to do when the spell ends? Fall on your tail after the pocket dimension poofs out of existence? Quite the wake-up call that would be. If it was literally just one minute longer I would agree with the sentiment. But as it stands, the spell is designed in such a way that it just edges out a short rest under normal use. Making it an invisibility spell that pushes the boundaries as far as it possibly can before it becomes something else, without hard-stopping it because 5e avoids hard stops as much as possible. Heck, even in prior editions it was a hiding spell first and foremost, so it's not like it's a hot new take on a classic spell.