There is no right or wrong way to transition. There are standards of care, which are guidelines that doctors use to treat trans patients, not rigid do it this way or the highway. In fact, with the way real life goes, it is impossible for any two transitions to be exactly the same, and to follow any protocols 100% perfectly. Also good doctors aren't cookbook doctors. They don't follow recipes the same way for everyone. Good doctors use some common sense and make adjustments for any given patient's needs.
I think forcing someone to live 24/7 before getting hormones opens us up to the worst risk, and the one irreversible risk, of transition, coming out to people. To live 24/7 including work means you must come out to work, your S.O., all your friends, and family, risk losing your job and everyone in your life, only to find out that you might not transition after all. There seems to be no point in taking that risk unless you know for sure you're absolutely sure you're going to proceed with transition.
If you are certain you are going to transition and you're ready to go full time before you start hormones, then be my guest and out yourself to everyone and start living your authentic life.
If you're really uncertain of your gender identity, which many of us are because we fight this tooth and nail, you may need to try hormones first to get confirmation of gender identity. In that case maybe trying hormones before going full time and coming out to everyone would be better.
What I did was somewhere in the middle. I did neither 1-2 years RLE before starting hormones, nor took hormones for 1-2 years before going full time.
I first went out on a Friday night to a safe TG support group. I continued to go out only at support groups for a month. Then I took my first "solo" outing - without any friends or safe support group - I went on a scenic drive, to Starbucks, and a bookstore. I continued for two more months of safe support groups and more weekend outings.
Then I lived a full weekend as a woman, and then another one. Then I took a week off from work and lived a full week, well 9.5 days counting weekends, as a woman. After returning to work I knew that going full time was imminent and I was a miserable wreck having to go to work in male mode. By the grace of God, I lost my job and was given a freebie to go full-time. Actually I went 165, because I was still going to AA as a man. I continued that for two more months, and started hormones. I eventually got re-hired at my old job. Then I came out at AA and went full time. I still have plenty of work ahead of me, but I am living full-time now. This happened in a span of 7 months.
Everyone's story is different. Some of us may have no choice but to go full-time before starting hormones. Some of us need to try hormones to confirm our gender identity. Some of us because of our living circumstances need to do as much hair removal and be on hormones for a year before we can start living as a woman, because it's pass or die for some of us. Some of us might live as a woman outside of work (nights & weekends) and go to work as male for a few years before going full-time. Everyone's path is different.