My children spend 45 hours a week at daycare. They spend 75ish hours sleeping. That leaves 48 hours a week with me and my wife.
We both work for a variety of reasons, and none of them is "not wanting to raise our children". We also both grew up in 2 parent working households and I know for me, it was great to have the example of parents who didn't subscribe to rigid gender roles and split parenting roles according to their abilities. In addition to her full time job, my mom taught childbirth classes one evening a week, which gave me undivided time with my dad. We went stargazing and built my first toolbox and all sorts of fun stuff during that time - it is one of my most cherished memories of our time together.
To answer OP, we have two children, 1 and almost 3, and we both work full time. As I mentioned, our kids are at daycare about 9 hours a day, which is enabled by our short commutes. But as others have mentioned, we are in this arrangement because right now, we both want to be working and it furthers our goals for our family. I also stayed home until our oldest was 6 months, and I honestly don't think it made life much easier. Having sub-6 month old children is a hard gig, either way.
Basically, there are two things that make this sustainable for us. First, we just had to accept that during the first year of having a new baby, you are TIRED. It is a huge life adjustment to care for tiny people, no matter what your work situation is. It is temporary and it takes some time to find your footing as a new parent.
Second, we focus on using our time in the ways most important to us, since time is limited. Basically, like MMM, but for time rather than money. So we have a cleaning lady. And low expectations for what we will accomplish while our energy and attention is shifted to keeping small people alive. We've tried to find innovative ways to maintain our friendships and relationship. Every other week we do "date night in" after bedtime. One partner plans the date, which is some sort of meal, interactive activity (we've learned Italian phrases, tried to hula dance, done wine tasting and chocolate tasting, etc.), and sometimes a movie. The non-date weeks, we invite friends over for dinner, or one of us springs the other for some time out with friends. But again, we didn't have the energy for any of this the first year and that is okay. On weekend days, we do family activities, I take the toddler to the community garden, we enjoy free stuff around the city, or we take them to the park and ride bikes and scooters. We try to keep things low key, we have family quiet time every afternoon where the kids nap and we either nap or do hobbies or stuff around the house.
You are really in the thick of it right now, and it will get better. Only you can do the math on if two working parents makes sense, but knowing that most people are stretched thin during that first year was helpful for me.