I'd argue that there's a scriptural basis in the opposite direction. How worthy was Paul on the road to Damascus? How worthy was Alma the younger?
For all have sinned and fall short of the glory of god. How could anyone receive revelation if you had to be worthy to receive it?
With my background I strongly dislike our culture's obsession with "worthiness." As an orthodox believer scrupulosity hit me hard. I understand that our culture and teachings won't affect everyone the same way but I believe that our fixation with worthiness helped me establish what was a very unhealthy relationship with deity.
We talk about people that struggle to feel as though they have received revelation, people that have prayed their entire lives but have never felt a witness of what is held up as the standard of what witnesses a person in the community "should" have. As pointed out in other comments, and putting it in sheepese, maybe some people have that spiritual gift and some people are blessed with other spiritual gifts, just not the gift of feeling/receiving revelation. If we tie revelation to the concept of worthiness, what is the natural byproduct for a person that does not have the spiritual gift of revelation? They may feel unworthy, unloved, and struggle with self esteem. Meanwhile they are just as "worthy," maybe even more so than the people they admire for having received revelation.
We can be our own worst critics. In that environment we may see revelation as something that only happens to people that are better than us... and we struggle to receive revelation because we feel that everyone is better than us.
Not to be a jerk but look at Joseph Smith. If that guy was worthy enough to receive revelation then most people on this planet are worthy enough to receive revelation; morning, noon, and night. He was a deeply flawed individual, we all are. What if we trusted in our own ability to receive revelation half as much as we trusted his ability to receive revelation?
To this I will add:
Revelation is in the eye of the beholder. Some people might look at developing an effective vaccine for polio as an entirely human effort. Other people may look at that exact same thing and recognize the hand of god guiding researchers to the final product. The event looks the same on the outside, building on the collective knowledge that came before, trial and error, mishaps, a breakthrough, and finally success. Revelation, human effort, some mixture of both, you decide.
Putting it in the Mormon context; some may see revelations, others may call the exact same thing using your imagination. Some may see confirmation by the holy ghost, others may call the exact same feelings and process confirmation bias, bandwagon effect, etc. In other words, if the person struggling to feel worthy enough to receive revelation found the right words to describe to others what they do feel I think they'd find many people that would listen to their explanation and say, "Well yeah, that's revelation!"
Are we looking for a voice, a vision, a divine manifestation... or could we do with a little more self confidence in the decisions we take?