Like several folks here, I was vegetarian for a while in the past, and am still sympathetic to the cause (if that‘s an okay phrase to use to describe it?). I was a poor university student at the time (who enjoyed alcohol and marijuana), so I didn’t have enough money or presence of mind or education on the topic to do vegetarianism in a healthy way.
Nowadays, I wish I could commit fully to being vegetarian, but it really is inconvenient and expensive to try and do that in Japan (which is where I live). So, whenever an appetizing vegetarian option presents itself, I will go for it. But all too often, that option doesn't exist unless I prepare it myself, and I just don't always have the resources to do that.
One specific example: I work at a company where meals are provided for free. That's pretty hard to say no to! Unfortunately, the vegetarian option is _exactly the same every day_ and it is a big old lettuce salad with some beans, mini tomatoes, a potato and a ball of rice. Other options rotate on a daily basis, and include delicious stuff like ramen, elaborate lunch boxes, and different kinds of curry, but these all contain _multiple_ kinds of meat or meat-related products!
You do also have the option to sign up for an Indian cuisine meal plan, but the language in the sign-up process makes it clear that the option is intended for people with religious or dietary reasons, and are unable to eat anything else. As a non-Indian and non-religious person, it feels a bit disingenuous to sign up.
Once, when I went to Scotland, I found a restaurant in Edinburgh that offered vegetarian haggis! That struck me as a wacky and cheeky concept, so I had to try it. It was one of the most delicious meals I've ever had, and I'm sure it had very little relation to proper haggis, which was probably "the joke" — I can't claim to understand what they were aiming for, but the end result was good.
Anyway, to everyone who is a successful vegetarian, I really respect what you're doing, and hope to follow in your footsteps someday. My body just feels happier and healthier when it's not dealing with meat.
Currently, my policy is, if I'd feel okay catching the animal in the wild and preparing it myself, I feel pretty okay eating it. So that means fish is usually an option, and chicken is an option when I'm feeling adventurous.