It's certainly not too late, but it'll be a financial burden that may delay other things you want to do like buying a house or moving or whatever. You really have to ask yourself what it's worth to you. Like not feeling like you're living up to your own potential may a be a good reason but I couldn't say the respect of others is worth much to me. If you're going to make major changes in your life make sure it's for yourself, and not to look good to other people, or to make them see you as an equal, because that isn't fulfilling long term.

I personally never bothered to finish a degree, but I can't say I've ever felt inferior to people who have. College was a lot like high school, rewarding effort and obedience far more than it does intelligence. A degree doesn't make someone smarter or more knowledgeable, they just have a piece of paper that proves what they know. If you just want to study shit for the sake of knowing shit yo, can do that on your own time. A university is a good place to find a lot of information pertinent to a field of study but you can still find pretty much all of that information on the Internet.

Job wise, I wouldn't want the jobs most people in universities are going for. Could I be a doctor if I wanted to be? Absolutely, but do I want to work insane hours in a hospital dealing with matters of life and death for 50+ hours a week? Fuck that noise. I've got a nice cushy desk job where people leave me alone, I work reasonable hours, and I get good benefits and good pay. What do I care if a doctor thinks he's better than me? What do I care if a stranger on the street thinks a doctor is better than me? In my case there's no good reason to go back to school for more, even though I could. Just something to think about.