My path is similar.
Played guitar for 10 years, dabbling on bass - then got asked to join a band on bass. I was bored and up for the challenge. I had a Mustang at the time, and considered it a beginner, or toy bass. I used it until I could afford a "real" full size bass.
The guys I was playing with were AWESOME in that they let me flub around with my fingers. I really wanted to be a finger style player, and they had faith in me. It was rough going for a few months, but I finally locked in. About 25 years later, I'm absolutely certain that bass was the instrument I was born to play. I love it. I'm obsessed with it. I've had lots more success with it than guitar, and I actually did pretty well in my first bands - on guitar.
Something I realized in the 80s while I was still playing guitar. As a guitarist, even if I played awesomely, I'd be one out of a million guitarists who played awesomely. Though many don't want to admit this, I knew I could be a much better bass player in much less time - and I was right. It was far easier to land great gigs as a bassist for me, than as a guitarist. That realization came to me when I was first wanting to play covers. I was learning Sweet Child of Mine, and realized how much ridiculously easier it was to learn the bass, than all those solos. I was right

.
Bass is easier.
Bass is more fun.
Bass trumps guitar always, cuz as Gene Simmons said, "A guitarist can play a C chord. If I play a G on top of that, the band just played a G."
I could go on.
I love the bass.
Oh, almost forgot - after all those years of playing every long scale bass under the sun, I'm now playing Mustangs only - for the past year.