I think it's probably similar to the math I was trying to run when Uber and Lyft pulled the rug out from under me over the last couple of years by dropping my car from Premier and getting rid of Lyft Lux. I did the math three different ways to figure out if purchasing a vehicle that could do the better rides was worth it. Every time I came to the same conclusion - nope.
Chances are, your take-home profit from going to Uber Commercial will be less or equal to the same old UberX or whatever else you qualify for now once you subtract the additional cost. In my case, it was a different vehicle. In your case, it's the insurance premium.
Either way, do the math with the monthly insurance premium and assumed increase in business. That part is tricky because you don't have exact numbers on what the increase will be and Uber/Lyft can pull the rug out at any time by getting ride of Uber Commercial, reducing the rides you qualify for, economy takes a dump and a ton of drivers sign up, business dries up due to recession, etc. etc. etc.
It's a very risky move with very little upside. Which is why I've worked over the last few years to get out of this business. While no job, business venture or investment is ever 100% certain, rideshare is perhaps one of the least certain "jobs" there are. Not worth investing in, either time or money. Just a basic "time for money" exchange. Well, and vehicle equity....