I understand the point you're trying to make, but I am pointing out that it's easy to think of the grass as being greener on the other side when the reality might not be so rosy. As I said, I don't know enough about all of those fields to comment on them, but I do have enough friends in optometry/pharmacy to know a few things about how those fields are doing right now. Optometry in particular is not doing well.
Optometry school has gotten really expensive in recent years. The cost of some optometry schools is actually pretty similar to medical school. So 4 years = approximately 200k including living expenses. Pretty similar debt load compared to med school, right? Except your earning potential will barely crack 6 figures assuming you get a good job. Starting offers for an optometrist who go into an employed position are usually around 70-80k.
As far as the job situation, optometrists are getting decimated by places like Warby-Parker and Zenni optical. 10-20 years ago it would have been a very lucrative business to open your own optometry practice and charge $500 for a pair of glasses, but now people are catching on, paying $70 for an eye exam at Costco, and getting their glasses for $10-99 online. If you thought there was a lot of doom & gloom on these forums, just go take a look at an optometry forum:
http://www.optiboard.com/forums/showthread.php/51675-Stopping-Warby-Parker