I think what some are missing here are several other factors to consider. First off, the rules and regulations in the industry have gotten much stiffer/less tolerant over time. That is not going to change. The magnifying glass only grows larger and tolerance smaller. Are you truly willing and able to understand the consequences of what this means and abide by whatever the rules are by the industry and by your company's own standards, or is it more important to just do what you want to do anyway as long as you think you can get away with it or you think that you are fine to bend these rules. Does your profession mean enough to you to understand and commit to having the self-discipline to comply with all the standards set forth. How serious/important is this career for you or is it just a "job".
Secondly, one has to be honest within themselves as to the lifestyle they are leading and how it may affect their ability to do their job. And what I mean by this, is do you always have in the front of your mind that you must be at 100% mentally together/alert and physically ready to do the task at hand. Have you gotten enough true rest, are your personal issues/problem/stress at check and in control, are you at your peak mentally and physically and at your sharpest to perform your job in the event that something, anything goes tits up.Can you say that you are being a true professional and showing up for work at 100% every single day. Or is it okay just to show up in a condition that you deem as alright because that is what you want and think you can just skate by without any real consequences.
Thirdly, you hope to have a long career. You have invested all of your adulthood, a huge sum of money, years of training, years of scraping by, years of holding down other flying jobs and perhaps teaching, to finally get to your goal of THE job in aviation that you have sought, dreamed of, sacrificed for and worked for your entire life. Your wife or significant other or kids have also been by your side to make that commitment with you and with their sacrifice and support. You may even still have debt from training or school or a mortgage to pay off. You want to be in this industry for as long as possible and get as far as you can. You have enough to worry about in being able to keep your medical intact for as long as possible as it is. Can you commit to trying to be the best you can be physically, trying to be as healthy as possible and in shape to ensure this. Even then, anything can happen along the way. Everyone is going to age. If you think any of this gets better or easier the older you get, it doesn't. It's also worthwhile to consider what kind of shape you want to find yourself in medically when you finally do retire. It's not a sprint, it's a damn long marathon. Are you really going to last a couple of more decades and be able to do what it takes to endure all the ups and downs, the changes and the uncertainty, if you cannot control your own personal behavior, set your priorities and decide what really has significance and importance in the long run. Or is it all about the potential of chucking all of this away on a foolish whim, denial, immaturity and refusal to see reality and the big picture.